organic compounds
E)-N′-{[(1R,3R)-3-isopropyl-1-methyl-2-oxocyclopentyl]methylidene}-4-methylbenzenesulfonohydrazide
of (aFakultät für Chemie und Chemische Biologie, Technische Universität Dortmund, Otto-Hahn-Strasse 6, 44221 Dortmund, Germany
*Correspondence e-mail: hans.preut@tu-dortmund.de
The title compound, C17H24N2O3S, was synthesized in order to determine the of the corresponding β-keto aldehyde. In the U-shaped molecule, the five-membered ring approximates an envelope with the methylene atom adjacent to the quaternary C atom being the flap. The dihedral angles between the four nearly coplanar atoms of the five-membered ring and the flap and the aromatic ring are 38.8 (4) and 22.9 (2)°, respectively. The bond angles around the S atom are in the range 104.11 (16)–119.95 (16)°. In the crystal, molecules are linked via N—H⋯O by hydrogen bonds, forming a chain along the a-axis direction.
Keywords: crystal structure; benzenesulfonohydrazide; terpenoid-related building blocks; hydrogen bonding; cyclopentanoids.
CCDC reference: 1437665
1. Related literature
For the synthesis of terpenoid-related building blocks, in particular cyclopentanoids, see: Becker et al. (2013); Gille et al. (2011); Helmboldt et al. (2006); Nelson et al. (2011); Tymann et al.(2014). For a review on cyclopentanoids by ring contraction see: Silva (2002). For a solid–acid catalysed rearrangement of cyclic α,β-epoxy see: Elings et al. (2000).
2. Experimental
2.1. Crystal data
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2.3. Refinement
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Data collection: CrysAlis CCD (Oxford Diffraction, 2008); cell CrysAlis CCD (Oxford Diffraction, 2008); data reduction: CrysAlis RED (Oxford Diffraction, 2008); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL2013 (Sheldrick, 2008); molecular graphics: SHELXTL-Plus (Sheldrick, 2008); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009).
Supporting information
CCDC reference: 1437665
10.1107/S2056989014026747/tk5349sup1.cif
contains datablocks I, 2864. DOI:Structure factors: contains datablock I. DOI: 10.1107/S2056989014026747/tk5349Isup2.hkl
Supporting information file. DOI: 10.1107/S2056989014026747/tk5349Isup3.cml
A sealable glass pressure tube was charged with a solution of trans-3-Isopropyl-1-methyl-2-oxocyclopentane-1-carbaldehyde (II) (C10H16O2, M = 168.23 g/mol, [α]D20 = +248.3 (c 0.059 mol/L, CHCl3), 150 mg, 0.89 mmol, 1.0 eq) and p-toluenesulfonyl hydrazide (C7H10N2O2S, M = 186.23 g/mol, 232 mg, 1.24 mmol, 1.4 eq) in methanol (9 ml, 10.1 ml/mmol). The tube was sealed with a Teflon screw cap and placed in a pre-heated oil bath (353 K). After being stirred for 2.5 h at 353 K, the reaction mixture was cooled to ambient temperature and stirred for additional 16 h at room temperature. Next, the volatiles were removed under reduced pressure. Purification of the residue by flash (cyclohexane/ethyl acetate 50/1 to 5/1) delivered the title compound (I) (C17H24N2O3S, M = 336.45 g/mol, 161 mg, 0.48 mmol, 54%) as a white solid and as an apparent mixture of double bond isomers (ratio = 68:32). Subsequent recrystallization of (I) from n-pentane provided colourless plates of the E-configured double bond isomer of (I). The ratio of isomers was determined by integration of the 1H NMR signals at 6.66 p.p.m. (s, 1H) and 7.12 p.p.m. (s, 1H). Characterization data are reported for the mixture of isomers. Rf 0.44 (cyclohexane/ethyl acetate 2/1); m.p. 361–363 K; 1H NMR (CDCl3, 500 MHz, ratio of double bond isomers = 68:32) δ 0.81 (d, J = 6.7 Hz, 3Hmajor), 0.93 (d, J = 6.9 Hz, 3Hminor), 0.97 (d, J = 6.7 Hz, 3Hmajor), 1.08–1.09 (m, 3Hmajor+3Hminor), 1.12 (s, 3Hminor), 1.52–1.59 (m, 1Hminor), 1.62–1.81 (m, 2Hmajor+3Hminor), 1.93–2.02 (m, 1Hmajor), 2.05–2.23 (m, 3Hmajor+1Hminor), 2.42 (s, 3Hminor), 2.43 (s, 3Hmajor), 2.53–2.56 (m, 1Hminor), 6.66 (s, 1Hminor), 7.12 (s 1Hminor), 7.29–7.32 (m, 2Hmajor+2Hminor), 7.58 (br. s, 1H), 7.70 (br. s, 1H), 7.79 (d, J = 8.2 Hz, 2Hmajor), 7.84 (d, J = 8.2 Hz, 2Hminor); 13C NMR (CDCl3, 126 MHz) δ 16.9 (CH3minor), 18.5 (CH3major), 19.3 (CH3minor), 20.1 (CH3major), 20.5 (CH2major), 20.9 (CH3major), 21.57 (CH3minor), 21.59 (CH3major), 23.7 (CH3minor), 24.3 (CH2minor), 26.2 (CHmajor), 27.3 (CHminor), 31.4 (CH2major), 35.8 (CH2minor), 53.1 (Cmajor), 55.2 (CHminor), 55.3 (CHmajor), 61.9 (Cminor), 127.8 (CHminor), 127.9 (CHmajor), 129.4 (CHminor), 129.5 (CHmajor), 135.1 (Cmajor), 136.6 (Cminor), 134.8 (Cminor), 144.2 (Cmajor), 152.8 (CHmajor), 154.0 (CHminor), 218.9 (Cmajor+Cminor); IR ν 3445 (m), 3175 (m), 2960 (m), 2360 (w), 1730 (s), 1595 (m), 1470 (m), 1355 (s), 1320 (m), 1185 (s), 1165 (s), 1093 (m), 815 (s); Anal. Calcd. for C17H24N2O3S: C, 60.7; H, 7.2; N, 8.3; Found: C, 60.9; H, 7.2; N, 8.1.
Data collection: CrysAlis CCD (Oxford Diffraction, 2008); cell
CrysAlis CCD (Oxford Diffraction, 2008); data reduction: CrysAlis RED (Oxford Diffraction, 2008); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL2013 (Sheldrick, 2008); molecular graphics: SHELXTL-Plus (Sheldrick, 2008); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009).Fig. 1. : The molecular structure of the title compound, showing the labelling of all non-H atoms. Displacement ellipsoids are shown at the 30% probability level. |
C17H24N2O3S | Z = 2 |
Mr = 336.44 | F(000) = 360 |
Monoclinic, P21 | Dx = 1.271 Mg m−3 |
a = 6.6198 (8) Å | Mo Kα radiation, λ = 0.71073 Å |
b = 16.8318 (18) Å | µ = 0.20 mm−1 |
c = 7.9506 (9) Å | T = 173 K |
β = 97.141 (11)° | Plate, colourless |
V = 879.00 (17) Å3 | 0.23 × 0.10 × 0.03 mm |
Oxford Diffraction Xcalibur Sapphire3 diffractometer | 3684 independent reflections |
Radiation source: Enhance (Mo) X-ray Source | 3185 reflections with I > 2σ(I) |
Detector resolution: 16.0560 pixels mm-1 | Rint = 0.032 |
phi and ω scans | θmax = 27.0°, θmin = 2.4° |
Absorption correction: multi-scan (CrysAlis CCD; Oxford Diffraction, 2008) | h = −7→8 |
Tmin = 0.98, Tmax = 1.00 | k = −21→21 |
6620 measured reflections | l = −10→9 |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: mixed |
R[F2 > 2σ(F2)] = 0.044 | H atoms treated by a mixture of independent and constrained refinement |
wR(F2) = 0.091 | w = 1/[σ2(Fo2) + (0.0406P)2] where P = (Fo2 + 2Fc2)/3 |
S = 1.01 | (Δ/σ)max < 0.001 |
3684 reflections | Δρmax = 0.21 e Å−3 |
216 parameters | Δρmin = −0.29 e Å−3 |
1 restraint | Absolute structure: Flack x determined using 1307 quotients [(I+)-(I-)]/[(I+)+(I-)] (Parsons & Flack,2004) |
Primary atom site location: structure-invariant direct methods | Absolute structure parameter: 0.02 (5) |
C17H24N2O3S | V = 879.00 (17) Å3 |
Mr = 336.44 | Z = 2 |
Monoclinic, P21 | Mo Kα radiation |
a = 6.6198 (8) Å | µ = 0.20 mm−1 |
b = 16.8318 (18) Å | T = 173 K |
c = 7.9506 (9) Å | 0.23 × 0.10 × 0.03 mm |
β = 97.141 (11)° |
Oxford Diffraction Xcalibur Sapphire3 diffractometer | 3684 independent reflections |
Absorption correction: multi-scan (CrysAlis CCD; Oxford Diffraction, 2008) | 3185 reflections with I > 2σ(I) |
Tmin = 0.98, Tmax = 1.00 | Rint = 0.032 |
6620 measured reflections |
R[F2 > 2σ(F2)] = 0.044 | H atoms treated by a mixture of independent and constrained refinement |
wR(F2) = 0.091 | Δρmax = 0.21 e Å−3 |
S = 1.01 | Δρmin = −0.29 e Å−3 |
3684 reflections | Absolute structure: Flack x determined using 1307 quotients [(I+)-(I-)]/[(I+)+(I-)] (Parsons & Flack,2004) |
216 parameters | Absolute structure parameter: 0.02 (5) |
1 restraint |
Experimental. Absorption correction: CrysAlis PRO, Agilent Technologies, Version 1.171.36.24 (release 03–12-2012 CrysAlis171. NET) (compiled Dec 3 2012,18:21:49) Empirical absorption correction using spherical harmonics, implemented in SCALE3 ABSPACK scaling algorithm. |
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes. |
Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger. |
x | y | z | Uiso*/Ueq | ||
S | 0.09218 (13) | 0.45682 (4) | 0.12604 (10) | 0.0211 (2) | |
O1 | 0.2056 (4) | 0.41202 (15) | 0.0179 (3) | 0.0301 (7) | |
O2 | −0.1089 (4) | 0.43231 (14) | 0.1507 (3) | 0.0328 (7) | |
O3 | 0.7126 (4) | 0.64917 (14) | 0.0645 (3) | 0.0263 (6) | |
N1 | 0.0612 (5) | 0.54744 (16) | 0.0481 (4) | 0.0201 (7) | |
N2 | 0.2410 (4) | 0.59285 (16) | 0.0665 (4) | 0.0190 (6) | |
C1 | 0.6011 (7) | 0.4966 (3) | 0.8060 (5) | 0.0363 (10) | |
H1A | 0.6121 | 0.5531 | 0.8347 | 0.054* | |
H1B | 0.7374 | 0.4746 | 0.8012 | 0.054* | |
H1C | 0.5358 | 0.4684 | 0.8926 | 0.054* | |
C2 | 0.4754 (6) | 0.4867 (2) | 0.6364 (5) | 0.0233 (8) | |
C4 | 0.4451 (5) | 0.4458 (2) | 0.3415 (4) | 0.0209 (8) | |
H4 | 0.5048 | 0.4249 | 0.2483 | 0.025* | |
C3 | 0.5595 (5) | 0.4551 (2) | 0.4991 (4) | 0.0233 (7) | |
H3 | 0.6986 | 0.4396 | 0.5133 | 0.028* | |
C5 | 0.2427 (5) | 0.46758 (19) | 0.3241 (4) | 0.0185 (7) | |
C6 | 0.1547 (6) | 0.4995 (2) | 0.4585 (5) | 0.0251 (8) | |
H6 | 0.0157 | 0.5151 | 0.4435 | 0.030* | |
C7 | 0.2701 (6) | 0.5084 (2) | 0.6137 (5) | 0.0277 (9) | |
H7 | 0.2095 | 0.5295 | 0.7063 | 0.033* | |
C8 | 0.2181 (5) | 0.66745 (19) | 0.0519 (4) | 0.0190 (7) | |
H8 | 0.0848 | 0.6889 | 0.0286 | 0.023* | |
C9 | 0.3979 (6) | 0.7225 (2) | 0.0708 (5) | 0.0206 (8) | |
C10 | 0.5880 (5) | 0.67705 (19) | 0.1474 (5) | 0.0199 (8) | |
C11 | 0.6049 (6) | 0.6771 (2) | 0.3399 (5) | 0.0229 (8) | |
H11 | 0.5766 | 0.6223 | 0.3794 | 0.027* | |
C12 | 0.8215 (6) | 0.7019 (2) | 0.4184 (5) | 0.0260 (9) | |
H12 | 0.9204 | 0.6689 | 0.3633 | 0.031* | |
C13 | 0.8553 (7) | 0.6835 (3) | 0.6095 (5) | 0.0462 (12) | |
H13A | 0.9966 | 0.6954 | 0.6544 | 0.069* | |
H13B | 0.8275 | 0.6271 | 0.6276 | 0.069* | |
H13C | 0.7633 | 0.7161 | 0.6681 | 0.069* | |
C14 | 0.8694 (6) | 0.7886 (2) | 0.3864 (5) | 0.0331 (10) | |
H14A | 0.7745 | 0.8227 | 0.4385 | 0.050* | |
H14B | 0.8555 | 0.7986 | 0.2641 | 0.050* | |
H14C | 1.0091 | 0.8005 | 0.4361 | 0.050* | |
C15 | 0.4298 (6) | 0.7325 (2) | 0.3774 (5) | 0.0283 (9) | |
H15A | 0.3113 | 0.7012 | 0.4040 | 0.034* | |
H15B | 0.4747 | 0.7677 | 0.4747 | 0.034* | |
C16 | 0.3749 (6) | 0.7811 (2) | 0.2166 (5) | 0.0282 (9) | |
H16A | 0.4683 | 0.8268 | 0.2132 | 0.034* | |
H16B | 0.2334 | 0.8011 | 0.2095 | 0.034* | |
C17 | 0.4217 (6) | 0.7612 (2) | −0.0986 (5) | 0.0296 (10) | |
H17A | 0.4403 | 0.7200 | −0.1823 | 0.044* | |
H17B | 0.5406 | 0.7964 | −0.0853 | 0.044* | |
H17C | 0.2994 | 0.7923 | −0.1372 | 0.044* | |
H1N | −0.051 (6) | 0.572 (2) | 0.079 (5) | 0.027 (11)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S | 0.0204 (5) | 0.0192 (4) | 0.0219 (4) | −0.0035 (4) | −0.0047 (3) | 0.0012 (4) |
O1 | 0.0387 (18) | 0.0257 (13) | 0.0233 (14) | 0.0052 (12) | −0.0065 (13) | −0.0048 (11) |
O2 | 0.0232 (16) | 0.0337 (15) | 0.0382 (16) | −0.0125 (11) | −0.0090 (12) | 0.0108 (12) |
O3 | 0.0152 (14) | 0.0305 (14) | 0.0335 (15) | 0.0027 (11) | 0.0039 (12) | −0.0092 (12) |
N1 | 0.0120 (16) | 0.0218 (16) | 0.0252 (17) | −0.0016 (12) | −0.0024 (13) | 0.0021 (13) |
N2 | 0.0129 (16) | 0.0229 (15) | 0.0209 (16) | −0.0022 (12) | 0.0005 (12) | 0.0003 (12) |
C1 | 0.046 (3) | 0.032 (2) | 0.027 (2) | −0.004 (2) | −0.009 (2) | −0.0023 (18) |
C2 | 0.029 (2) | 0.0184 (18) | 0.021 (2) | −0.0061 (15) | −0.0019 (17) | 0.0027 (14) |
C4 | 0.0215 (19) | 0.0194 (19) | 0.0217 (17) | 0.0011 (16) | 0.0023 (14) | 0.0007 (15) |
C3 | 0.0167 (17) | 0.0217 (16) | 0.0296 (18) | 0.0004 (17) | −0.0053 (14) | 0.0021 (19) |
C5 | 0.0200 (18) | 0.0157 (18) | 0.0188 (16) | −0.0015 (14) | −0.0018 (14) | 0.0005 (14) |
C6 | 0.020 (2) | 0.0289 (19) | 0.026 (2) | 0.0013 (16) | 0.0034 (17) | 0.0025 (16) |
C7 | 0.034 (2) | 0.028 (2) | 0.021 (2) | 0.0013 (17) | 0.0071 (18) | −0.0025 (16) |
C8 | 0.0119 (18) | 0.0218 (18) | 0.0229 (18) | 0.0016 (14) | 0.0008 (14) | −0.0003 (15) |
C9 | 0.0154 (19) | 0.0183 (18) | 0.029 (2) | −0.0004 (14) | 0.0039 (16) | 0.0001 (15) |
C10 | 0.014 (2) | 0.0154 (17) | 0.031 (2) | −0.0055 (14) | 0.0051 (16) | −0.0030 (15) |
C11 | 0.019 (2) | 0.0229 (19) | 0.027 (2) | −0.0016 (15) | 0.0032 (16) | 0.0008 (16) |
C12 | 0.017 (2) | 0.035 (2) | 0.026 (2) | 0.0014 (15) | 0.0024 (17) | −0.0061 (17) |
C13 | 0.037 (3) | 0.067 (3) | 0.034 (3) | −0.001 (2) | 0.000 (2) | −0.002 (2) |
C14 | 0.021 (2) | 0.038 (2) | 0.041 (2) | −0.0060 (17) | 0.0044 (19) | −0.0082 (19) |
C15 | 0.021 (2) | 0.035 (2) | 0.030 (2) | −0.0016 (17) | 0.0063 (17) | −0.0097 (18) |
C16 | 0.020 (2) | 0.0221 (18) | 0.043 (2) | 0.0017 (15) | 0.0068 (18) | −0.0071 (17) |
C17 | 0.024 (2) | 0.028 (2) | 0.037 (2) | 0.0000 (16) | 0.0047 (19) | 0.0094 (17) |
S—O1 | 1.426 (3) | C9—C17 | 1.522 (5) |
S—O2 | 1.431 (3) | C9—C10 | 1.533 (5) |
S—N1 | 1.649 (3) | C9—C16 | 1.544 (5) |
S—C5 | 1.765 (3) | C10—C11 | 1.520 (5) |
O3—C10 | 1.213 (4) | C11—C15 | 1.546 (5) |
N1—N2 | 1.407 (4) | C11—C12 | 1.548 (5) |
N1—H1N | 0.91 (4) | C11—H11 | 1.0000 |
N2—C8 | 1.268 (4) | C12—C14 | 1.522 (6) |
C1—C2 | 1.503 (5) | C12—C13 | 1.539 (5) |
C1—H1A | 0.9800 | C12—H12 | 1.0000 |
C1—H1B | 0.9800 | C13—H13A | 0.9800 |
C1—H1C | 0.9800 | C13—H13B | 0.9800 |
C2—C3 | 1.391 (5) | C13—H13C | 0.9800 |
C2—C7 | 1.398 (5) | C14—H14A | 0.9800 |
C4—C5 | 1.380 (5) | C14—H14B | 0.9800 |
C4—C3 | 1.390 (5) | C14—H14C | 0.9800 |
C4—H4 | 0.9500 | C15—C16 | 1.523 (6) |
C3—H3 | 0.9500 | C15—H15A | 0.9900 |
C5—C6 | 1.387 (5) | C15—H15B | 0.9900 |
C6—C7 | 1.376 (5) | C16—H16A | 0.9900 |
C6—H6 | 0.9500 | C16—H16B | 0.9900 |
C7—H7 | 0.9500 | C17—H17A | 0.9800 |
C8—C9 | 1.501 (5) | C17—H17B | 0.9800 |
C8—H8 | 0.9500 | C17—H17C | 0.9800 |
O1—S—O2 | 119.95 (16) | O3—C10—C9 | 123.9 (3) |
O1—S—N1 | 108.22 (16) | C11—C10—C9 | 110.7 (3) |
O2—S—N1 | 104.11 (16) | C10—C11—C15 | 103.4 (3) |
O1—S—C5 | 108.13 (16) | C10—C11—C12 | 110.8 (3) |
O2—S—C5 | 109.82 (16) | C15—C11—C12 | 116.0 (3) |
N1—S—C5 | 105.67 (15) | C10—C11—H11 | 108.8 |
N2—N1—S | 113.5 (2) | C15—C11—H11 | 108.8 |
N2—N1—H1N | 116 (2) | C12—C11—H11 | 108.8 |
S—N1—H1N | 113 (2) | C14—C12—C13 | 110.5 (3) |
C8—N2—N1 | 116.0 (3) | C14—C12—C11 | 113.1 (3) |
C2—C1—H1A | 109.5 | C13—C12—C11 | 110.9 (3) |
C2—C1—H1B | 109.5 | C14—C12—H12 | 107.3 |
H1A—C1—H1B | 109.5 | C13—C12—H12 | 107.3 |
C2—C1—H1C | 109.5 | C11—C12—H12 | 107.3 |
H1A—C1—H1C | 109.5 | C12—C13—H13A | 109.5 |
H1B—C1—H1C | 109.5 | C12—C13—H13B | 109.5 |
C3—C2—C7 | 118.4 (3) | H13A—C13—H13B | 109.5 |
C3—C2—C1 | 121.0 (4) | C12—C13—H13C | 109.5 |
C7—C2—C1 | 120.6 (4) | H13A—C13—H13C | 109.5 |
C5—C4—C3 | 118.3 (3) | H13B—C13—H13C | 109.5 |
C5—C4—H4 | 120.8 | C12—C14—H14A | 109.5 |
C3—C4—H4 | 120.8 | C12—C14—H14B | 109.5 |
C4—C3—C2 | 121.6 (3) | H14A—C14—H14B | 109.5 |
C4—C3—H3 | 119.2 | C12—C14—H14C | 109.5 |
C2—C3—H3 | 119.2 | H14A—C14—H14C | 109.5 |
C4—C5—C6 | 121.4 (3) | H14B—C14—H14C | 109.5 |
C4—C5—S | 119.7 (3) | C16—C15—C11 | 105.5 (3) |
C6—C5—S | 118.8 (3) | C16—C15—H15A | 110.6 |
C7—C6—C5 | 119.5 (3) | C11—C15—H15A | 110.6 |
C7—C6—H6 | 120.2 | C16—C15—H15B | 110.6 |
C5—C6—H6 | 120.2 | C11—C15—H15B | 110.6 |
C6—C7—C2 | 120.7 (3) | H15A—C15—H15B | 108.8 |
C6—C7—H7 | 119.7 | C15—C16—C9 | 104.6 (3) |
C2—C7—H7 | 119.7 | C15—C16—H16A | 110.8 |
N2—C8—C9 | 121.2 (3) | C9—C16—H16A | 110.8 |
N2—C8—H8 | 119.4 | C15—C16—H16B | 110.8 |
C9—C8—H8 | 119.4 | C9—C16—H16B | 110.8 |
C8—C9—C17 | 110.1 (3) | H16A—C16—H16B | 108.9 |
C8—C9—C10 | 109.5 (3) | C9—C17—H17A | 109.5 |
C17—C9—C10 | 113.3 (3) | C9—C17—H17B | 109.5 |
C8—C9—C16 | 108.5 (3) | H17A—C17—H17B | 109.5 |
C17—C9—C16 | 114.9 (3) | C9—C17—H17C | 109.5 |
C10—C9—C16 | 100.0 (3) | H17A—C17—H17C | 109.5 |
O3—C10—C11 | 125.3 (3) | H17B—C17—H17C | 109.5 |
O1—S—N1—N2 | −71.4 (3) | N2—C8—C9—C10 | −13.1 (5) |
O2—S—N1—N2 | 159.9 (2) | N2—C8—C9—C16 | −121.3 (3) |
C5—S—N1—N2 | 44.2 (3) | C8—C9—C10—O3 | 97.8 (4) |
S—N1—N2—C8 | −161.8 (3) | C17—C9—C10—O3 | −25.6 (5) |
C5—C4—C3—C2 | −0.9 (5) | C16—C9—C10—O3 | −148.4 (3) |
C7—C2—C3—C4 | 0.7 (5) | C8—C9—C10—C11 | −86.2 (4) |
C1—C2—C3—C4 | −179.9 (3) | C17—C9—C10—C11 | 150.5 (3) |
C3—C4—C5—C6 | 1.2 (5) | C16—C9—C10—C11 | 27.7 (4) |
C3—C4—C5—S | 179.9 (3) | O3—C10—C11—C15 | 169.9 (3) |
O1—S—C5—C4 | 10.2 (3) | C9—C10—C11—C15 | −6.1 (4) |
O2—S—C5—C4 | 142.7 (3) | O3—C10—C11—C12 | 45.0 (5) |
N1—S—C5—C4 | −105.5 (3) | C9—C10—C11—C12 | −131.0 (3) |
O1—S—C5—C6 | −171.1 (3) | C10—C11—C12—C14 | 68.4 (4) |
O2—S—C5—C6 | −38.5 (3) | C15—C11—C12—C14 | −49.0 (4) |
N1—S—C5—C6 | 73.2 (3) | C10—C11—C12—C13 | −166.7 (3) |
C4—C5—C6—C7 | −1.2 (5) | C15—C11—C12—C13 | 75.8 (4) |
S—C5—C6—C7 | −179.9 (3) | C10—C11—C15—C16 | −18.9 (4) |
C5—C6—C7—C2 | 0.9 (6) | C12—C11—C15—C16 | 102.6 (4) |
C3—C2—C7—C6 | −0.7 (5) | C11—C15—C16—C9 | 37.0 (4) |
C1—C2—C7—C6 | 179.9 (3) | C8—C9—C16—C15 | 75.9 (4) |
N1—N2—C8—C9 | 179.3 (3) | C17—C9—C16—C15 | −160.4 (3) |
N2—C8—C9—C17 | 112.1 (4) | C10—C9—C16—C15 | −38.7 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1N···O3i | 0.91 (4) | 2.03 (4) | 2.889 (4) | 158 (3) |
Symmetry code: (i) x−1, y, z. |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1N···O3i | 0.91 (4) | 2.03 (4) | 2.889 (4) | 158 (3) |
Symmetry code: (i) x−1, y, z. |
Acknowledgements
Financial support obtained from the Beilstein Institut is gratefully acknowledged
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Prompted by our efforts in natural product synthesis, we seek access to cyclopentyl units. Herein, we chosed a ring contraction strategy of a cyclic epoxy ketone. A Brønsted-acid promoted [1,2]-sigmatropic rearrangement of cis-piperitone oxide delivered trans-3-Isopropyl-1-methyl-2-oxocyclopentane-1-carbaldehyde (II). A subsequent condensation of (II) with p-toulenesulfonyl hydrazide afforded the title compound (I).