Synthesis and crystal structure of rac-2-(1,3-dioxo­isoindolin-2-yl)ethyl 4-methyl-N-phenyl-N′-(tri­iso­propyl­sil­yl)benzene­sulfondiimidoate: the first member of a new substance class

Friedrich, E.; Heinrich, T.; Rosenberger, L.; Krier, M.; Marek, S.; Reggelin, M.

doi:10.1107/S2056989022005904

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ISSN: 2056-9890

Volume 78| Part 7| July 2022| Pages 699-702

https://doi.org/10.1107/S2056989022005904

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Synthesis and crystal structure of rac-2-(1,3-dioxoisoindolin-2-yl)ethyl 4-methyl-N-phenyl-N′-(triisopropylsilyl)benzenesulfondiimidoate: the first member of a new substance class

Erik Friedrich,^a Timo Heinrich,^b Lara Rosenberger,^b Mireille Krier,^b Stephanie Marek ^b and Michael Reggelin ^a ^*

^aAlarich-Weiss-Str. 4, 64287 Darmstadt, Germany, and ^bMerck KGaA, Frankfurter Str. 250, 64293 Darmstadt, Germany
^*Correspondence e-mail: re@chemie.tu-darmstadt.de

Edited by M. Zeller, Purdue University, USA (Received 4 May 2022; accepted 2 June 2022; online 10 June 2022)

The title compound {systematic name: rac-2-[7-methyl-4-(4-methylphenyl)-4-(phenylimino)-6,6-bis(propan-2-yl)-3-oxa-4λ⁶-thia-5-aza-6-silaoct-4-en-1-yl]-2,3-dihydro-1H-isoindole-1,3-dione}, C₃₂H₄₁N₃O₃SSi, was synthesized by desoxychlorination of 4-methyl-N-phenyl-N′-(triisopropylsilyl)benzenesulfonimidamide and subsequent reaction with 2-(2-hydroxyethyl)isoindoline-1,3-dione. The racemic compound was crystallized from isopropanol. The structural characterization by single-crystal X-ray diffraction revealed two double-bonded nitrogen atoms to the central sulfur atom and an overall crystal packing driven by its aromatic interactions.

Keywords: sulfondiimidoate; sulfondiimidate; crystal structure; bioisosters.

CCDC reference: 2163661

1. Chemical context

Since 2013 (Lücking, 2013 , 2019 ), there has been an increased research interest in bioisosters of sulfonamides and sulfones. In addition to vigorous interest in the development of new synthetic procedures towards sulfonimidamides (Nandi & Arvidsson, 2018 ; Chen & Gibson, 2015 ; Wen et al., 2016 ; Izzo et al., 2017 ; Greed et al., 2020 ; Liu et al., 2021 ), activities towards the synthesis of sulfondiimides have recently just begun (Zhang et al., 2019 ; Bohmann et al., 2019 ). With the synthesis of stable sulfondiimidamides, Zhang & Willis (2022 ) introduced a new functional group for medicinal chemistry.

The different aza-analogs of sulfonamides and sulfones have interesting properties for medicinal chemistry due to the (additional) nitrogen atom(s). Besides the potential centrochirality of sulfur, the nitrogen substituents offer new possibilities for functionalization optimizing steric demand, solubility and reactivity.

The herein reported sulfondiimidoate 1 is, based on extensive database searches, not yet described in the literature and therefore represents the first member of a new substance class. It can be described as an aza-oxo-inverse sulfonamide or an aza-analogue of a sulfonimidoate.

2. Structural commentary

The title compound 1 crystallizes in the triclinic crystal system and P $[\overline{1}]$ as the centrosymmetric space group, having one molecule in the asymmetric unit (Fig. 1). Geometric parameters may be regarded as normal. A selection is listed in Table 1.

Table 1
Selected geometric parameters (Å, °)

S1—N1	1.5139 (16)	S1—C17	1.7718 (19)
S1—N2	1.4838 (16)	Si—N2	1.7240 (17)
S1—O1	1.6257 (14)	N1—C11	1.412 (2)

N1—S1—O1	105.93 (8)	N2—S1—N1	126.60 (9)
N1—S1—C17	101.98 (9)	S1—N2—Si	142.24 (11)
N2—S1—O1	107.27 (8)	N2—Si—C27	105.99 (9)

Figure 1
The molecular structure of 2-(1,3-dioxoisoindolin-2-yl)ethyl-4-methyl-N-phenyl-N′-(triisopropylsilyl)benzenesulfondiimidoate (1) with the atomic numbering scheme. Displacement ellipsoids are drawn at the 50% probability level.

The tetrahedral molecular structure shows a sulfur as the central atom, surrounded by four substituents, including two sulfur–nitrogen double bonds. As a result of the steric repulsion of the aniline ring and the bulky triisopropylsilyl group, the angle N2—S1—N1 at 126.60 (9)° is larger than the typical tetrahedral angle (109.5°), whereas the angle between the aniline and toluene ring (N1—S1—C17) and also the 1,3-dioxoisoindolin moiety (N1—S1—O1) are smaller at 101.98 (9) and 105.93 (8)°, respectively. The remaining angle (N2—S1—O1) is 107.27 (8)°. The bond lengths between S1—N1 [1.5139 (16) Å] and S1—N2 [1.4838 (16) Å] are similar to those observed in crystal structures of sulfoximines [1.484 Å; CSD refcode: LISJAZ (Lemasson et al., 2007 ) or 1.518 Å; CSD refcode: NADNAH; (Mash et al., 1996 )], and therefore confirming the presence of the double bonds (Reggelin & Zur, 2000 ). The ring systems are planar (r.m.s values of 0.003 and 0.007 Å for the phenyl rings and 0.022 Å for the phthalimide).

3. Supramolecular features

The title compound 1 contains secondary nitrogen groups and a dicarboximide, which are hydrogen-bond acceptors, but no strong or moderate intermolecular hydrogen bonds were detected in the crystal. Geometric details of some possible weak hydrogen bonds are listed in Table 2. This includes three borderline C—H⋯O hydrogen bonds, which link the chains via the operators 1 + x, −1 + y, z and 2 − x, 1 − y, 1 − z. The contact C31—H31⋯N1, involving a tertiary methyl group, connects the molecules via the operator x, 1 + y, z. Fig. 2 shows the unit cell of the compound along the b-axis. It appears that the crystal structure contains anti-parallel π stacking interactions of the phthalimide between its electron-rich six-membered ring and electron-poor five-membered ring (Ahmed et al., 2019 ). The centroid-to-centroid distance of 3.470 (1) Å, which is in the range of π–π stacking interactions, confirms its presence. The crystal packing is mainly driven by its attractive intermolecular aromatic interactions, as can be shown by the Aromatics Analyser (feature available in Mercury as part of the CSD-Materials and CSD-Enterprise suites). The distance between centroids for which the assessment was labelled `strong' equals to 4.11 Å (score: 9.3) and for the `moderate' ones between 4.48 and 6.39 Å (score: 6.9–3.7) by the CCDC's Aromatics Analyser using a score from 0 (no stabilizing contribution) to 10 (an ideal aromatic interaction geometry) (assessment: `weak' 0–3, `moderate' 3–7, `strong' 7–10. Mercury 2021.3.0 (Build 333817) used (Macrae et al., 2020 ).

Table 2
Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C15—H15⋯O2ⁱ	0.95	2.52	3.429 (3)	160
C22—H22⋯O2ⁱⁱ	0.95	2.64	3.348 (3)	132
C14—H14⋯O3ⁱⁱⁱ	0.95	2.52	3.429 (3)	161
C31—H31B⋯N1^iv	0.98	2.60	3.361 (3)	135
Symmetry codes: (i) ; (ii) ; (iii) ; (iv) x, y+1, z.

Figure 2
Crystal packing in rac-2-(1,3-dioxoisoindolin-2-yl)ethyl-4-methyl-N-phenyl-N′-(triisopropylsilyl)benzenesulfondiimidoate (1) viewed along the b axis. Antiparallel stacking of the phthalimide occurs with a centroid–centroid distance of 3.470 (1) Å. Displacement ellipsoids are drawn at the 50% probability level and H atoms are omitted for clarity.

4. Database survey

The herein reported sulfondiimidoate 1 is, based on extensive database searches, not yet described in the literature. A Scifinderⁿ structure search with undefined bonds on all substituents of the sulfur and a substituent on the oxygen atom resulted in no structure matches as drawn (SciFinder; Chemical Abstracts Service: Columbus, OH; https://scifinder.cas.org; accessed: 06.05.2022). A broadly defined Cambridge Structural Database search with the five central atoms and any type of bonds (SMARTS pattern [#7]∼[#16](∼[#8])(∼[#6])∼[#7]) on CSD version 5.43 November 2021 plus update of March 2022 found 85 hits (Groom et al., 2016 ), all of which are sulfonimidamides.

Restricting this query to a single bond (instead of any bond) between the sulfur and the oxygen returns zero hits. The mean distance between sulfur and oxygen in the 85 hits dataset is 1.436 with a standard deviation of 0.014. The distance S1—O1 (see also Table 1) is hence clearly a single bond and similar functional groups have not been missed by setting the query in too narrow a way.

5. Synthesis and crystallization

Molecular schemes with the atom numbering used in the NMR assignments can be found in Figures S1–S3 in the supporting information. Solvent residue signals were used as internal standard according to the literature [¹H-NMR: δ (CHCl₃) = 7.26 ppm; ¹³C-NMR: δ (CDCl₃) = 77.16 ppm; (Gottlieb et al., 1997 )]. The synthesis is shown in Fig. 3.

Figure 3
Synthesis of the sulfondiimidoate 1. (a) TIPS-Cl, NEt₃; (b) C₂Cl₆, PPh₃, NEt₃, aniline; (c) C₂Cl₆, PPh₃, NEt₃, N-hydroxyethylphthalimide.

N-(Tri-iso-propylsilyl)-4-methylbenzenesulfonamide (3)

7.51 mL (6.82 g, 35.0 mmol, 1.2 eq.) of TIPS-Cl and 12.1 mL (8.87 g, 87.6 mmol, 3.0 eq.) of NEt₃ were added to a suspension of 5.00 g (29.2 mmol, 1.0 eq.) of p-toluenesulfonamide (2) in 100 mL of CH₂Cl₂. After stirring for 62 h, 100 mL of 1M HCl were added to the reaction mixture. The aqueous layer was extracted with CH₂Cl₂ three times, the combined organic layers were dried over MgSO₄, the solvent was removed under reduced pressure and the crude product was dissolved in 100 mL of CH₂Cl₂. After addition of 300 mL of petroleum ether, the CH₂Cl₂ was removed under reduced pressure. The resulting precipitate was filtered off and washed with pentane. After drying, the protected sulfonamide 3 (9.12 g, 27.8 mmol, 95%) was obtained as a colorless solid. R_f 0.75 (20% EtOAc in pentane). M.p. = 427 K. IR (ATR)/cm⁻¹ 1462, 1344, 1286, 1154, 1094, 1004, 936. ¹H-NMR (CDCl₃, 500 MHz, 300 K): δ = 7.80 (d, J = 8.3 Hz, 4-H₂), 7.27 (d, J = 8.3 Hz, 3-H₂), 4.43 (bs, 6-H₁), 2.42 (s, 1-H₃), 1.29 (hep., J = 7.5 Hz, 7-H₃), 1.15 (d, J = 7.5 Hz, 8-H₁₈) ppm. ¹³C-NMR (CDCl₃, 125 MHz, 300 K): δ = 142.6 (2-C), 141.1 (5-C), 129.5 (3-C₂), 126.2 (4-C₂), 21.6 (1-C), 18.1 (8-C₆), 12.1 (7-C₃) ppm. Calculated for C₁₆H₂₉NO₂SSi: C 58.67, H 8.92, N 4.28; found: C 58.68, H 9.30, N 4.53. ESI–MS: m/z = 328.18 [M + H]⁺, 677.33 [2M + Na]⁺.

4-Methyl-N-phenyl-N′-(tri-iso-propylsilyl)benzenesulfonimidamide (4)

3.98 g (16.8 mmol, 1.1 eq) of C₂Cl₆ and 4.40 g (16.8 mmol, 1.1 eq) of PPh₃ were heated to reflux of the solvent in 60 mL of CHCl₃ for 6 h. After cooling to room temperature, 3.19 mL (2.32 g, 22.9 mmol, 1.5 eq) of NEt₃ was added via syringe. After five minutes, the reaction mixture was cooled to 273 K. After another five minutes, 5.00 g (15.3 mmol, 1.0 eq) of 4-methyl-N-(triisopropylsilyl)benzenesulfonamide (3) were added. After ten more minutes, 5.58 mL (5.69 g, 61.1 mmol, 4.0 eq) of aniline were added via syringe and the mixture was stirred for one h, at which point the reaction was stopped by the addition of 100 mL of saturated NH₄Cl solution. The aqueous phase was extracted three times with 50 mL of CH₂Cl₂. The combined organic layers were dried over MgSO₄, the solvent was removed under reduced pressure and the crude product was purified by flash chromatography (5% EtOAc in pentane) affording the sulfonimidamide 4 (5.64 g, 14.0 mmol, 92%) as a colorless solid. R_f 0.63 (20% EtOAc in pentane). M.p. = 364 K. IR (ATR)/cm⁻¹ 3228, 1600, 1480, 1410, 1347, 1282, 1141, 1091, 895. ¹H-NMR (CDCl₃, 500 MHz, 300 K): δ = 7.68 (d, J = 8.3Hz, 4-H₂), 7.19–7.13 (m, 3/8-H₄), 7.03–6.97 (m, 9/10-H₃), 6.30 (bs, 6-H), 2.34 (s, 1-H₃), 1.18–1.03 (m, 11/12-H₂₁) ppm. ¹³C-NMR (CDCl₃, 125 MHz, 300 K): δ = 142.2 (7-C), 141.0 (2-C), 138.9 (5-C), 129.2 (9-C₂), 129.0 (3-C₂), 127.1 (4-C₂), 124.2 (8-C₂), 121.2 (10-C), 21.5 (1-C), 18.5 (12-C₆), 13.3 (11-C₃) ppm. Calculated for C₂₂H₃₄N₂OSSi: C 65.62, H 6.96, N 8.51; found: C 65.65, H 6.97, N 8.55. ESI–MS: m/z = 403.22 [M + H]⁺.

rac-2-(1,3-Dioxo-iso-indolin-2-yl)ethyl-4-methyl-N-phenyl-N′-(tri-iso-propylsilyl)benzenesulfondiimidoate (1)

282 mg (1.19 mmol, 1.2 eq) of C₂Cl₆ and 313 mg (1.19 mmol, 1.2 eq) of PPh₃ were heated to reflux of the solvent in 5 mL of CHCl₃ for 6 h. After cooling to room temperature, 0.83 mL (603 mg, 5.96 mmol, 6.0 eq) of NEt₃ were added via syringe. After five minutes, the reaction mixture was cooled to 273 K. After five more minutes, 400 mg (0.99 mmol, 1.0 eq) of 4-methyl-N-phenyl-N′-(triisopropylsilyl)benzenesulfonimidamide (4) were added and the reaction mixture was stirred for 20 more minutes at 273 K, at which point 1.52 g (7.95 mmol, 8.0 eq) of 2-(2-hydroxyethyl)isoindoline-1,3-dione were added. The mixture was stirred for another 30 min and then quenched with 20 mL of saturated NH₄Cl solution. After phase separation, the aqueous solution was extracted three times with 20 mL of CH₂Cl₂, the combined organic layers were dried over MgSO₄, the solvent was removed under reduced pressure and the resulting crude product was purified by flash chromatography (8% EtOAc in pentane) affording the sulfondiimidoate 1 (447 mg, 0.78 mmol, 78%) as a colorless solid. Crystals suitable for X-ray structure analysis were obtained by recrystallization from iso-propanol. R_f 0.16 (10% EtOAc in pentane). M.p. = 380 K. IR (ATR)/cm⁻¹ 2941, 2862, 1712, 1594, 1488, 1391, 1294, 1056, 995. ¹H-NMR (CDCl₃, 500 MHz, 300 K): δ = 7.83–7.77 (m, 4/16-H₄), 7.75–7.70 (m, 17-H₂), 7.11–7.04 (m, 3/10-H₄), 6.98–6.96 (m, 9-H₂), 6.82 (t, J = 7.3 Hz, 11-H), 4.19–4.06 (m, 12-H₂), 3.88 (t, J = 5.6 Hz, 13-H₂), 2.30 (s, 1-H₃), 0.94–0.88 (m, 6/7-H₂₁) ppm. ¹³C-NMR (CDCl₃, 125 MHz, 300 K): δ = 167.9 (14-C₂), 144.6 (8-C), 142.4 (2-C), 139.3 (5-C), 134.0 (17-C₂), 132.2 (1-C₂), 129.3 (3-C₂), 128.7 (10-C₂), 127.5 (4-C₂), 123.7 (9-C₂), 123.4 (16-C₂), 121.2 (11-C), 64.5 (12-C), 37.2 (13-C), 21.6 (1-C), 18.3 (7-C₃), 18.3 (7′-C₃), 13.3 (6-C₃) ppm. Calculated for C₃₂H₄₁N₃O₃SSi: C 66.75, H 7.18, N 7.30; found: C 66.62, H 6.86, N 7.13. ESI–MS: m/z = 576.27 [M + H]⁺.

6. Refinement

Crystal data, data collection and structure refinement details are summarized in Table 3. Hydrogen atoms were refined isotropically using a riding model. The C—H bond distances were constrained to 0.95 Å for aromatic C—H moieties, and to 1.00, 0.99 and 0.98 Å for aliphatic C—H, CH₂ and CH₃ moieties, respectively. Methyl-H atoms were allowed to rotate but not to tip to best fit the experimental electron density. U_iso(H) values were set to a multiple of U_eq(C) with 1.5 for CH₃, and 1.2 for C—H, CH₂ groups, respectively.

Table 3
Experimental details

Crystal data
Chemical formula	C₃₂H₄₁N₃O₃SSi
M_r	575.83
Crystal system, space group	Triclinic, P $[\overline{1}]$
Temperature (K)	100
a, b, c (Å)	8.6752 (2), 8.8765 (2), 20.2299 (6)
α, β, γ (°)	78.107 (2), 87.922 (2), 89.512 (2)
V (Å³)	1523.37 (7)
Z	2
Radiation type	Cu Kα
μ (mm⁻¹)	1.61
Crystal size (mm)	0.21 × 0.16 × 0.06

Data collection
Diffractometer	XtaLAB Synergy R, HyPix-Arc 150
Absorption correction	Gaussian (CrysAlis PRO; Rigaku, 2021 $[Rigaku (2021). CrysAlis PRO. Rigaku Oxford Diffraction, Yarnton, England.]$ )
T_min, T_max	0.555, 1.000
No. of measured, independent and observed [I > 2σ(I)] reflections	28106, 5410, 4426
R_int	0.047
(sin θ/λ)_max (Å⁻¹)	0.597

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.041, 0.108, 1.05
No. of reflections	5410
No. of parameters	368
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	0.56, −0.38
Computer programs: CrysAlis PRO (Rigaku, 2021 $[Rigaku (2021). CrysAlis PRO. Rigaku Oxford Diffraction, Yarnton, England.]$ ), SHELXT2014/5 (Sheldrick, 2015a ), SHELXL2018/1 (Sheldrick, 2015b ), Mercury (Macrae et al., 2020) and OLEX2 (Dolomanov et al., 2009 ).

Supporting information

CCDC reference: 2163661

Crystal structure: contains datablock I. DOI: https://doi.org/10.1107/S2056989022005904/zl5029sup1.cif

Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S2056989022005904/zl5029Isup2.hkl

Molecular schemes with atom numbering used in the NMR assignments. DOI: https://doi.org/10.1107/S2056989022005904/zl5029sup3.pdf

Supporting information file. DOI: https://doi.org/10.1107/S2056989022005904/zl5029Isup4.cdx

Supporting information file. DOI: https://doi.org/10.1107/S2056989022005904/zl5029Isup5.cdx

Supporting information file. DOI: https://doi.org/10.1107/S2056989022005904/zl5029Isup6.cdx

Supporting information file. DOI: https://doi.org/10.1107/S2056989022005904/zl5029Isup7.cml

checkCIF report

Computing details top

Data collection: CrysAlis PRO (Rigaku, 2021); cell refinement: CrysAlis PRO (Rigaku, 2021); data reduction: CrysAlis PRO (Rigaku, 2021); program(s) used to solve structure: SHELXT2014/5 (Sheldrick, 2015a); program(s) used to refine structure: SHELXL2018/1 (Sheldrick, 2015b); molecular graphics: Mercury (Macrae et al., 2020); software used to prepare material for publication: OLEX2 (Dolomanov et al., 2009).

rac-2-[7-Methyl-4-(4-methylphenyl)-4-(phenylimino)-6,6-bis(propan-2-yl)-3-oxa-4λ⁶-thia-5-aza-6-silaoct-4-en-1-yl]-2,3-dihydro-1H-isoindole-1,3-dione top

Crystal data top

C₃₂H₄₁N₃O₃SSi	Z = 2
M_r = 575.83	F(000) = 616
Triclinic, P1	D_x = 1.255 Mg m⁻³
a = 8.6752 (2) Å	Cu Kα radiation, λ = 1.54184 Å
b = 8.8765 (2) Å	Cell parameters from 4930 reflections
c = 20.2299 (6) Å	θ = 4.5–72.1°
α = 78.107 (2)°	µ = 1.61 mm⁻¹
β = 87.922 (2)°	T = 100 K
γ = 89.512 (2)°	Needle, colourless
V = 1523.37 (7) Å³	0.21 × 0.16 × 0.06 mm

Data collection top

XtaLAB Synergy R, HyPix-Arc 150 diffractometer	5410 independent reflections
Radiation source: Rotating-anode X-ray tube, PhotonJet R (Cu) X-ray Source	4426 reflections with I > 2σ(I)
Mirror monochromator	R_int = 0.047
Detector resolution: 10.0000 pixels mm^-1	θ_max = 67.1°, θ_min = 4.5°
ω scans	h = −10→9
Absorption correction: gaussian (CrysAlisPro; Rigaku, 2021)	k = −10→10
T_min = 0.555, T_max = 1.000	l = −24→24
28106 measured reflections

Refinement top

Refinement on F²	Primary atom site location: dual
Least-squares matrix: full	Hydrogen site location: inferred from neighbouring sites
R[F² > 2σ(F²)] = 0.041	H-atom parameters constrained
wR(F²) = 0.108	w = 1/[σ²(F_o²) + (0.0575P)² + 0.4269P] where P = (F_o² + 2F_c²)/3
S = 1.05	(Δ/σ)_max = 0.001
5410 reflections	Δρ_max = 0.56 e Å⁻³
368 parameters	Δρ_min = −0.38 e Å⁻³
0 restraints

Special details top

Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å²) top

	x	y	z	U_iso*/U_eq
S1	0.64242 (5)	0.36921 (5)	0.76180 (2)	0.01884 (13)
Si	0.82253 (6)	0.58177 (6)	0.83046 (3)	0.01969 (14)
O1	0.53274 (15)	0.43170 (15)	0.69843 (7)	0.0213 (3)
O2	0.37133 (16)	0.92827 (16)	0.67134 (7)	0.0286 (3)
O3	0.61871 (16)	0.63745 (16)	0.53826 (7)	0.0293 (3)
N1	0.75807 (18)	0.26207 (18)	0.73756 (9)	0.0224 (4)
N3	0.47858 (18)	0.75010 (18)	0.61476 (8)	0.0220 (4)
N2	0.67766 (18)	0.50250 (18)	0.79249 (8)	0.0215 (4)
C17	0.5169 (2)	0.2380 (2)	0.81561 (10)	0.0191 (4)
C11	0.8812 (2)	0.3081 (2)	0.69029 (10)	0.0215 (4)
C4	0.6598 (2)	0.9038 (2)	0.54781 (10)	0.0238 (4)
C30	0.8671 (2)	0.7773 (2)	0.77709 (11)	0.0249 (5)
H30	0.941234	0.829050	0.801923	0.030*
C16	1.0089 (2)	0.2104 (2)	0.69474 (11)	0.0252 (5)
H16	1.013655	0.123095	0.730762	0.030*
C9	0.5850 (2)	0.9926 (2)	0.58821 (10)	0.0247 (4)
C20	0.3301 (2)	0.0244 (2)	0.90149 (11)	0.0252 (5)
C18	0.5129 (2)	0.2342 (2)	0.88389 (10)	0.0227 (4)
H18	0.573253	0.304358	0.901627	0.027*
C3	0.5901 (2)	0.7473 (2)	0.56355 (10)	0.0226 (4)
C21	0.3360 (2)	0.0304 (2)	0.83209 (11)	0.0268 (5)
H21	0.275146	−0.039010	0.814108	0.032*
C10	0.4654 (2)	0.8955 (2)	0.63090 (10)	0.0234 (4)
C12	0.8784 (2)	0.4379 (2)	0.63815 (10)	0.0239 (4)
H12	0.792938	0.506435	0.634980	0.029*
C22	0.4293 (2)	0.1361 (2)	0.78878 (11)	0.0246 (4)
H22	0.433214	0.138741	0.741556	0.030*
C1	0.4033 (2)	0.5309 (2)	0.70767 (10)	0.0231 (4)
H1A	0.429808	0.598387	0.738910	0.028*
H1B	0.312386	0.468228	0.727047	0.028*
C19	0.4200 (2)	0.1271 (2)	0.92686 (11)	0.0256 (5)
H19	0.417784	0.123993	0.974110	0.031*
C24	0.9990 (2)	0.4556 (2)	0.83641 (11)	0.0243 (4)
H24	1.024122	0.441481	0.789435	0.029*
C2	0.3681 (2)	0.6264 (2)	0.63933 (11)	0.0239 (4)
H2A	0.366244	0.558188	0.606327	0.029*
H2B	0.263929	0.671795	0.641762	0.029*
C13	0.9999 (2)	0.4674 (2)	0.59088 (11)	0.0278 (5)
H13	0.997509	0.556827	0.555804	0.033*
C27	0.7421 (2)	0.5970 (2)	0.91717 (11)	0.0246 (4)
H27	0.750357	0.492007	0.946548	0.030*
C8	0.6216 (3)	1.1462 (2)	0.58321 (11)	0.0317 (5)
H8	0.570588	1.207038	0.610828	0.038*
C28	0.5708 (2)	0.6429 (3)	0.91904 (12)	0.0294 (5)
H28A	0.558879	0.749867	0.894987	0.044*
H28B	0.533930	0.632856	0.966109	0.044*
H28C	0.510518	0.575262	0.897214	0.044*
C25	0.9721 (2)	0.2933 (2)	0.87942 (12)	0.0296 (5)
H25A	0.947197	0.300481	0.926309	0.044*
H25B	1.065707	0.231402	0.877778	0.044*
H25C	0.886315	0.244644	0.861586	0.044*
C5	0.7750 (2)	0.9636 (2)	0.50117 (11)	0.0282 (5)
H5	0.826384	0.902115	0.473913	0.034*
C15	1.1291 (2)	0.2406 (3)	0.64663 (12)	0.0301 (5)
H15	1.215207	0.172932	0.649736	0.036*
C14	1.1246 (2)	0.3683 (3)	0.59417 (12)	0.0303 (5)
H14	1.206057	0.387532	0.560883	0.036*
C7	0.7370 (3)	1.2071 (3)	0.53569 (11)	0.0344 (5)
H7	0.764486	1.312400	0.530483	0.041*
C23	0.2284 (3)	−0.0901 (3)	0.94846 (12)	0.0357 (6)
H23A	0.120046	−0.067014	0.938481	0.054*
H23B	0.246165	−0.083527	0.995349	0.054*
H23C	0.252958	−0.194293	0.942108	0.054*
C26	1.1435 (2)	0.5273 (3)	0.85938 (12)	0.0333 (5)
H26A	1.161285	0.629633	0.830942	0.050*
H26B	1.233053	0.461466	0.855196	0.050*
H26C	1.128079	0.536457	0.906621	0.050*
C29	0.8374 (3)	0.7056 (3)	0.94995 (12)	0.0371 (6)
H29A	0.945592	0.672665	0.951077	0.056*
H29B	0.797407	0.702220	0.996161	0.056*
H29C	0.829942	0.810909	0.923502	0.056*
C6	0.8126 (3)	1.1179 (3)	0.49584 (11)	0.0323 (5)
H6	0.891433	1.162922	0.464320	0.039*
C31	0.7218 (3)	0.8771 (3)	0.76655 (14)	0.0431 (6)
H31A	0.639953	0.820185	0.750234	0.065*
H31B	0.744630	0.971775	0.733154	0.065*
H31C	0.687716	0.903397	0.809501	0.065*
C32	0.9431 (3)	0.7677 (3)	0.70892 (13)	0.0485 (7)
H32A	1.035816	0.703364	0.716090	0.073*
H32B	0.971724	0.871329	0.684381	0.073*
H32C	0.870715	0.722351	0.682492	0.073*

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
S1	0.0187 (2)	0.0157 (2)	0.0222 (3)	−0.00142 (18)	0.00128 (19)	−0.00441 (18)
Si	0.0192 (3)	0.0161 (3)	0.0241 (3)	−0.0013 (2)	0.0001 (2)	−0.0050 (2)
O1	0.0210 (7)	0.0205 (7)	0.0231 (8)	0.0017 (5)	−0.0009 (6)	−0.0061 (6)
O2	0.0307 (8)	0.0274 (8)	0.0293 (8)	0.0035 (6)	0.0014 (7)	−0.0099 (6)
O3	0.0310 (8)	0.0248 (8)	0.0324 (9)	0.0012 (6)	0.0034 (7)	−0.0072 (7)
N1	0.0217 (8)	0.0165 (8)	0.0285 (10)	−0.0009 (7)	0.0028 (7)	−0.0043 (7)
N3	0.0216 (8)	0.0197 (8)	0.0248 (9)	−0.0007 (7)	−0.0004 (7)	−0.0048 (7)
N2	0.0200 (8)	0.0174 (8)	0.0284 (10)	−0.0009 (7)	−0.0009 (7)	−0.0079 (7)
C17	0.0173 (9)	0.0145 (9)	0.0250 (11)	0.0001 (7)	0.0016 (8)	−0.0028 (8)
C11	0.0200 (10)	0.0218 (10)	0.0258 (11)	−0.0034 (8)	0.0006 (8)	−0.0125 (8)
C4	0.0222 (10)	0.0243 (10)	0.0241 (11)	−0.0004 (8)	−0.0059 (8)	−0.0020 (8)
C30	0.0274 (11)	0.0192 (10)	0.0296 (12)	−0.0060 (8)	−0.0017 (9)	−0.0079 (9)
C16	0.0242 (11)	0.0237 (10)	0.0300 (12)	0.0011 (8)	−0.0012 (9)	−0.0111 (9)
C9	0.0265 (11)	0.0247 (10)	0.0229 (11)	−0.0026 (9)	−0.0067 (9)	−0.0040 (9)
C20	0.0204 (10)	0.0188 (10)	0.0344 (13)	−0.0001 (8)	0.0052 (9)	−0.0015 (9)
C18	0.0232 (10)	0.0189 (9)	0.0264 (11)	−0.0016 (8)	0.0008 (8)	−0.0056 (8)
C3	0.0213 (10)	0.0231 (10)	0.0230 (11)	0.0008 (8)	−0.0030 (8)	−0.0035 (9)
C21	0.0223 (10)	0.0193 (10)	0.0395 (13)	−0.0033 (8)	−0.0017 (9)	−0.0078 (9)
C10	0.0249 (10)	0.0228 (10)	0.0235 (11)	0.0011 (8)	−0.0066 (9)	−0.0061 (8)
C12	0.0226 (10)	0.0226 (10)	0.0285 (12)	−0.0012 (8)	0.0002 (9)	−0.0097 (9)
C22	0.0260 (11)	0.0230 (10)	0.0259 (11)	−0.0016 (8)	0.0009 (9)	−0.0076 (9)
C1	0.0188 (10)	0.0239 (10)	0.0264 (11)	0.0010 (8)	0.0025 (8)	−0.0054 (9)
C19	0.0281 (11)	0.0229 (10)	0.0248 (11)	0.0018 (9)	0.0037 (9)	−0.0032 (9)
C24	0.0218 (10)	0.0239 (10)	0.0283 (12)	0.0000 (8)	−0.0008 (9)	−0.0076 (9)
C2	0.0194 (10)	0.0230 (10)	0.0287 (12)	−0.0034 (8)	0.0010 (8)	−0.0042 (9)
C13	0.0311 (11)	0.0255 (11)	0.0284 (12)	−0.0091 (9)	0.0047 (9)	−0.0100 (9)
C27	0.0231 (10)	0.0251 (10)	0.0265 (11)	0.0004 (8)	−0.0001 (8)	−0.0074 (9)
C8	0.0402 (13)	0.0267 (11)	0.0292 (12)	−0.0027 (10)	−0.0073 (10)	−0.0068 (9)
C28	0.0256 (11)	0.0321 (11)	0.0329 (13)	−0.0004 (9)	0.0039 (9)	−0.0131 (10)
C25	0.0263 (11)	0.0248 (11)	0.0376 (13)	0.0044 (9)	−0.0068 (9)	−0.0055 (10)
C5	0.0242 (11)	0.0304 (11)	0.0274 (12)	−0.0012 (9)	−0.0035 (9)	0.0008 (9)
C15	0.0211 (11)	0.0327 (12)	0.0409 (14)	0.0001 (9)	0.0015 (9)	−0.0183 (10)
C14	0.0241 (11)	0.0350 (12)	0.0365 (13)	−0.0104 (9)	0.0085 (9)	−0.0193 (10)
C7	0.0419 (13)	0.0284 (11)	0.0319 (13)	−0.0137 (10)	−0.0111 (11)	−0.0014 (10)
C23	0.0301 (12)	0.0289 (12)	0.0441 (15)	−0.0060 (10)	0.0086 (10)	0.0008 (10)
C26	0.0219 (11)	0.0357 (12)	0.0435 (14)	0.0002 (9)	−0.0011 (10)	−0.0111 (11)
C29	0.0293 (12)	0.0521 (15)	0.0368 (14)	−0.0035 (11)	0.0009 (10)	−0.0254 (12)
C6	0.0297 (12)	0.0353 (12)	0.0290 (12)	−0.0102 (10)	−0.0053 (10)	0.0011 (10)
C31	0.0372 (13)	0.0207 (11)	0.0650 (18)	−0.0019 (10)	−0.0084 (12)	0.0075 (11)
C32	0.0789 (19)	0.0266 (12)	0.0378 (15)	−0.0098 (13)	0.0190 (14)	−0.0045 (11)

Geometric parameters (Å, º) top

S1—N1	1.5139 (16)	C19—H19	0.9500
S1—N2	1.4838 (16)	C24—H24	1.0000
S1—O1	1.6257 (14)	C24—C25	1.537 (3)
S1—C17	1.7718 (19)	C24—C26	1.539 (3)
Si—N2	1.7240 (17)	C2—H2A	0.9900
Si—C30	1.881 (2)	C2—H2B	0.9900
Si—C24	1.882 (2)	C13—H13	0.9500
Si—C27	1.894 (2)	C13—C14	1.383 (3)
O1—C1	1.452 (2)	C27—H27	1.0000
O2—C10	1.211 (2)	C27—C28	1.539 (3)
O3—C3	1.211 (2)	C27—C29	1.539 (3)
N1—C11	1.412 (2)	C8—H8	0.9500
N3—C3	1.396 (2)	C8—C7	1.394 (3)
N3—C10	1.398 (2)	C28—H28A	0.9800
N3—C2	1.459 (2)	C28—H28B	0.9800
C17—C18	1.374 (3)	C28—H28C	0.9800
C17—C22	1.392 (3)	C25—H25A	0.9800
C11—C16	1.394 (3)	C25—H25B	0.9800
C11—C12	1.394 (3)	C25—H25C	0.9800
C4—C9	1.388 (3)	C5—H5	0.9500
C4—C3	1.489 (3)	C5—C6	1.392 (3)
C4—C5	1.380 (3)	C15—H15	0.9500
C30—H30	1.0000	C15—C14	1.386 (3)
C30—C31	1.531 (3)	C14—H14	0.9500
C30—C32	1.525 (3)	C7—H7	0.9500
C16—H16	0.9500	C7—C6	1.387 (3)
C16—C15	1.389 (3)	C23—H23A	0.9800
C9—C10	1.486 (3)	C23—H23B	0.9800
C9—C8	1.385 (3)	C23—H23C	0.9800
C20—C21	1.393 (3)	C26—H26A	0.9800
C20—C19	1.392 (3)	C26—H26B	0.9800
C20—C23	1.507 (3)	C26—H26C	0.9800
C18—H18	0.9500	C29—H29A	0.9800
C18—C19	1.389 (3)	C29—H29B	0.9800
C21—H21	0.9500	C29—H29C	0.9800
C21—C22	1.387 (3)	C6—H6	0.9500
C12—H12	0.9500	C31—H31A	0.9800
C12—C13	1.387 (3)	C31—H31B	0.9800
C22—H22	0.9500	C31—H31C	0.9800
C1—H1A	0.9900	C32—H32A	0.9800
C1—H1B	0.9900	C32—H32B	0.9800
C1—C2	1.505 (3)	C32—H32C	0.9800

O1—S1—C17	101.13 (8)	N3—C2—C1	113.82 (17)
N1—S1—O1	105.93 (8)	N3—C2—H2A	108.8
N1—S1—C17	101.98 (9)	N3—C2—H2B	108.8
N2—S1—O1	107.27 (8)	C1—C2—H2A	108.8
N2—S1—N1	126.60 (9)	C1—C2—H2B	108.8
N2—S1—C17	111.06 (9)	H2A—C2—H2B	107.7
N2—Si—C30	107.57 (9)	C12—C13—H13	119.6
N2—Si—C24	110.09 (9)	C14—C13—C12	120.8 (2)
S1—N2—Si	142.24 (11)	C14—C13—H13	119.6
N2—Si—C27	105.99 (9)	Si—C27—H27	106.6
C30—Si—C24	110.30 (9)	C28—C27—Si	114.45 (15)
C30—Si—C27	111.23 (9)	C28—C27—H27	106.6
C24—Si—C27	111.50 (9)	C29—C27—Si	112.48 (14)
C1—O1—S1	118.87 (12)	C29—C27—H27	106.6
C11—N1—S1	125.44 (14)	C29—C27—C28	109.50 (17)
C3—N3—C10	112.05 (16)	C9—C8—H8	121.6
C3—N3—C2	123.98 (16)	C9—C8—C7	116.8 (2)
C10—N3—C2	122.95 (16)	C7—C8—H8	121.6
C18—C17—S1	119.20 (15)	C27—C28—H28A	109.5
C18—C17—C22	120.93 (18)	C27—C28—H28B	109.5
C22—C17—S1	119.81 (15)	C27—C28—H28C	109.5
C16—C11—N1	116.63 (18)	H28A—C28—H28B	109.5
C12—C11—N1	124.22 (17)	H28A—C28—H28C	109.5
C12—C11—C16	119.04 (19)	H28B—C28—H28C	109.5
C9—C4—C3	108.23 (18)	C24—C25—H25A	109.5
C5—C4—C9	121.8 (2)	C24—C25—H25B	109.5
C5—C4—C3	129.93 (19)	C24—C25—H25C	109.5
Si—C30—H30	107.8	H25A—C25—H25B	109.5
C31—C30—Si	111.13 (14)	H25A—C25—H25C	109.5
C31—C30—H30	107.8	H25B—C25—H25C	109.5
C32—C30—Si	112.26 (14)	C4—C5—H5	121.5
C32—C30—H30	107.8	C4—C5—C6	117.0 (2)
C32—C30—C31	110.0 (2)	C6—C5—H5	121.5
C11—C16—H16	119.9	C16—C15—H15	119.7
C15—C16—C11	120.2 (2)	C14—C15—C16	120.6 (2)
C15—C16—H16	119.9	C14—C15—H15	119.7
C4—C9—C10	108.12 (18)	C13—C14—C15	119.2 (2)
C8—C9—C4	121.5 (2)	C13—C14—H14	120.4
C8—C9—C10	130.3 (2)	C15—C14—H14	120.4
C21—C20—C23	121.1 (2)	C8—C7—H7	119.2
C19—C20—C21	118.59 (18)	C6—C7—C8	121.6 (2)
C19—C20—C23	120.3 (2)	C6—C7—H7	119.2
C17—C18—H18	120.2	C20—C23—H23A	109.5
C17—C18—C19	119.65 (19)	C20—C23—H23B	109.5
C19—C18—H18	120.2	C20—C23—H23C	109.5
O3—C3—N3	125.02 (18)	H23A—C23—H23B	109.5
O3—C3—C4	129.27 (19)	H23A—C23—H23C	109.5
N3—C3—C4	105.70 (16)	H23B—C23—H23C	109.5
C20—C21—H21	119.4	C24—C26—H26A	109.5
C22—C21—C20	121.12 (19)	C24—C26—H26B	109.5
C22—C21—H21	119.4	C24—C26—H26C	109.5
O2—C10—N3	124.20 (19)	H26A—C26—H26B	109.5
O2—C10—C9	129.97 (19)	H26A—C26—H26C	109.5
N3—C10—C9	105.82 (17)	H26B—C26—H26C	109.5
C11—C12—H12	119.9	C27—C29—H29A	109.5
C13—C12—C11	120.15 (19)	C27—C29—H29B	109.5
C13—C12—H12	119.9	C27—C29—H29C	109.5
C17—C22—H22	120.5	H29A—C29—H29B	109.5
C21—C22—C17	118.94 (19)	H29A—C29—H29C	109.5
C21—C22—H22	120.5	H29B—C29—H29C	109.5
O1—C1—H1A	110.2	C5—C6—H6	119.4
O1—C1—H1B	110.2	C7—C6—C5	121.2 (2)
O1—C1—C2	107.48 (15)	C7—C6—H6	119.4
H1A—C1—H1B	108.5	C30—C31—H31A	109.5
C2—C1—H1A	110.2	C30—C31—H31B	109.5
C2—C1—H1B	110.2	C30—C31—H31C	109.5
C20—C19—H19	119.6	H31A—C31—H31B	109.5
C18—C19—C20	120.8 (2)	H31A—C31—H31C	109.5
C18—C19—H19	119.6	H31B—C31—H31C	109.5
Si—C24—H24	106.0	C30—C32—H32A	109.5
C25—C24—Si	113.53 (14)	C30—C32—H32B	109.5
C25—C24—H24	106.0	C30—C32—H32C	109.5
C25—C24—C26	110.03 (18)	H32A—C32—H32B	109.5
C26—C24—Si	114.45 (14)	H32A—C32—H32C	109.5
C26—C24—H24	106.0	H32B—C32—H32C	109.5

S1—O1—C1—C2	154.80 (13)	C9—C4—C3—N3	−1.7 (2)
S1—N1—C11—C16	153.82 (16)	C9—C4—C5—C6	−0.5 (3)
S1—N1—C11—C12	−30.1 (3)	C9—C8—C7—C6	−0.7 (3)
S1—C17—C18—C19	−177.16 (14)	C20—C21—C22—C17	−0.5 (3)
S1—C17—C22—C21	177.63 (15)	C18—C17—C22—C21	0.5 (3)
O1—S1—N1—C11	71.56 (18)	C3—N3—C10—O2	176.21 (19)
O1—S1—N2—Si	−143.37 (17)	C3—N3—C10—C9	−2.9 (2)
O1—S1—C17—C18	−138.15 (15)	C3—N3—C2—C1	105.9 (2)
O1—S1—C17—C22	44.69 (16)	C3—C4—C9—C10	0.0 (2)
O1—C1—C2—N3	−74.8 (2)	C3—C4—C9—C8	−177.80 (19)
N1—S1—O1—C1	176.34 (13)	C3—C4—C5—C6	177.5 (2)
N1—S1—N2—Si	−17.3 (2)	C21—C20—C19—C18	0.4 (3)
N1—S1—C17—C18	112.72 (16)	C10—N3—C3—O3	−176.40 (19)
N1—S1—C17—C22	−64.45 (17)	C10—N3—C3—C4	2.9 (2)
N1—C11—C16—C15	174.52 (18)	C10—N3—C2—C1	−86.5 (2)
N1—C11—C12—C13	−174.88 (18)	C10—C9—C8—C7	−177.2 (2)
N2—S1—O1—C1	−46.09 (15)	C12—C11—C16—C15	−1.8 (3)
N2—S1—N1—C11	−55.1 (2)	C12—C13—C14—C15	−1.8 (3)
N2—S1—C17—C18	−24.57 (18)	C22—C17—C18—C19	0.0 (3)
N2—S1—C17—C22	158.26 (15)	C19—C20—C21—C22	0.1 (3)
N2—Si—C30—C31	55.01 (18)	C24—Si—N2—S1	−0.8 (2)
N2—Si—C30—C32	−68.60 (19)	C24—Si—C30—C31	175.10 (16)
N2—Si—C24—C25	−61.52 (17)	C24—Si—C30—C32	51.5 (2)
N2—Si—C24—C26	171.01 (15)	C24—Si—C27—C28	−157.85 (14)
N2—Si—C27—C28	−38.05 (17)	C24—Si—C27—C29	76.34 (17)
N2—Si—C27—C29	−163.87 (15)	C2—N3—C3—O3	−7.7 (3)
C17—S1—O1—C1	70.31 (14)	C2—N3—C3—C4	171.58 (17)
C17—S1—N1—C11	176.97 (17)	C2—N3—C10—O2	7.4 (3)
C17—S1—N2—Si	106.97 (18)	C2—N3—C10—C9	−171.74 (17)
C17—C18—C19—C20	−0.5 (3)	C27—Si—N2—S1	−121.54 (18)
C11—C16—C15—C14	0.6 (3)	C27—Si—C30—C31	−60.64 (18)
C11—C12—C13—C14	0.7 (3)	C27—Si—C30—C32	175.74 (17)
C4—C9—C10—O2	−177.3 (2)	C27—Si—C24—C25	55.82 (18)
C4—C9—C10—N3	1.7 (2)	C27—Si—C24—C26	−71.65 (18)
C4—C9—C8—C7	0.0 (3)	C8—C9—C10—O2	0.2 (4)
C4—C5—C6—C7	−0.1 (3)	C8—C9—C10—N3	179.2 (2)
C30—Si—N2—S1	119.40 (18)	C8—C7—C6—C5	0.7 (3)
C30—Si—C24—C25	179.92 (15)	C5—C4—C9—C10	178.36 (18)
C30—Si—C24—C26	52.46 (18)	C5—C4—C9—C8	0.6 (3)
C30—Si—C27—C28	78.57 (17)	C5—C4—C3—O3	−0.7 (4)
C30—Si—C27—C29	−47.24 (18)	C5—C4—C3—N3	−179.9 (2)
C16—C11—C12—C13	1.1 (3)	C23—C20—C21—C22	179.82 (19)
C16—C15—C14—C13	1.2 (3)	C23—C20—C19—C18	−179.31 (18)
C9—C4—C3—O3	177.6 (2)

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
C15—H15···O2ⁱ	0.95	2.52	3.429 (3)	160
C22—H22···O2ⁱⁱ	0.95	2.64	3.348 (3)	132
C14—H14···O3ⁱⁱⁱ	0.95	2.52	3.429 (3)	161
C31—H31B···N1^iv	0.98	2.60	3.361 (3)	135

Symmetry codes: (i) x+1, y−1, z; (ii) x, y−1, z; (iii) −x+2, −y+1, −z+1; (iv) x, y+1, z.

Funding information

Funding for this research was provided by: Merck KGaA.

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