organic compounds
(3aR,6S,7aR)-7a-Chloro-6-methyl-2-(4-nitrophenylsulfonyl)-1,2,3,6,7,7a-hexahydro-3a,6-epoxyisoindole
aDepartment of Chemistry, Faculty of Arts and Sciences, Niĝde University, TR-51240 Niĝde, Turkey, and bOndokuz Mayıs University, Arts and Sciences Faculty, Department of Physics, TR-55139 Samsun, Turkey
*Correspondence e-mail: etemel@omu.edu.tr
In the title compound, C15H15ClN2O5S, the tetrahydrofuran ring adopts an with the O atom as the flap. The pyrrolidine ring adopts an with the chlorine-substituted C atom as the flap. In the crystal, two types of C—H⋯O hydrogen bonds generate R22(20) and R44(26) rings, with adjacent rings running parallel to ac plane. Further C—H⋯O hydrogen bonds form a C(6) chain, linking the molecules in the b-axis direction.
CCDC reference: 962926
Related literature
For chemical background to protecting groups, see: Greene & Wuts (1999); Romanski et al. (2012); Chan & White (2004); Yasushi & Higuchi (2006); Blanc & Bochet (2007); Demircan & Parsons (2002); Demirtaş et al. (2002); Katritzky et al. (2004); Merlin et al. (1988); Büyükgüngör et al. (2005); Koşar et al. (2006a,b); Karaarslan et al. (2007); Demircan et al. (2011); Temel et al. (2011, 2012). For puckering parameters, see: Cremer & Pople, (1975). For hydrogen-bond motifs, see: Bernstein et al. (1995).
Experimental
Crystal data
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Data collection: X-AREA (Stoe & Cie, 2002); cell X-AREA; data reduction: X-RED32 (Stoe & Cie, 2002); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012) and Mercury (Macrae et al., 2006); software used to prepare material for publication: WinGX (Farrugia, 2012).
Supporting information
CCDC reference: 962926
10.1107/S1600536813026329/bt6935sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536813026329/bt6935Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536813026329/bt6935Isup3.cml
2-Chloro-N-(furan-2-ylmethyl)prop-2-en-1-amine, 1 (0.32 g, 1.72 mmol) in water (50 ml) was added p-nitrobenzenesulfonyl chloride (0.45 g, 2.06 mmol) portion wise followed by potassium carbonate (0.9 g, 6.45 mol). The reaction mixture was stirred for 48 h at 369 K. Then, the reaction mixture was allowed to warm up to room temperature and NaOH 10% (35 ml) was added. The mixture was then extracted with ethyl acetate (3x35 ml) and brine (35 ml). Combined organic phases were dried over magnesium sulfate, filtered and evaporated. The purification by
afforded colourless crystals (0.42 g, 66% yield). t.l.c., (Hexane:Ethylacetate); (8:2), Rf: 0.42). Recrystallization was performed in DCM:Hexane. Melting Point: 444–445 K.H atoms were positioned geometrically and treated using a riding model, fixing the bond lengths at 0.97, 0.98 and 0.93 Å for CH2, CH and CH(aromatic), respectively. The displacement parameters of the H atoms were constrained with Uiso(H) = 1.2Ueq (aromatic, methylene or methine C).
Data collection: X-AREA (Stoe & Cie, 2002); cell
X-AREA (Stoe & Cie, 2002); data reduction: X-RED32 (Stoe & Cie, 2002); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012) and Mercury (Macrae et al., 2006); software used to prepare material for publication: WinGX (Farrugia, 2012).Fig. 1. Synthesis of the title compound. | |
Fig. 2. The molecular structure of the title compound, with displacement ellipsoids drawn at the 30% probability level. | |
Fig. 3. Part of the crystal structure of the title compound, showing the formation of C(6) chain. | |
Fig. 4. Part of the crystal structure of the title compound, showing the formation of R22(10) and R44(26) rings. |
C15H15ClN2O5S | F(000) = 768 |
Mr = 370.80 | Dx = 1.512 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 13941 reflections |
a = 8.6049 (5) Å | θ = 1.6–27.2° |
b = 7.1949 (3) Å | µ = 0.39 mm−1 |
c = 26.8195 (15) Å | T = 296 K |
β = 101.186 (4)° | Plate, colorless |
V = 1628.89 (15) Å3 | 0.48 × 0.24 × 0.02 mm |
Z = 4 |
Stoe IPDS 2 diffractometer | 3449 independent reflections |
Radiation source: fine-focus sealed tube | 1564 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.090 |
rotation method scans | θmax = 26.8°, θmin = 1.6° |
Absorption correction: integration (X-RED32; Stoe & Cie, 2002) | h = −10→10 |
Tmin = 0.894, Tmax = 0.992 | k = −9→9 |
13941 measured reflections | l = −33→33 |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.068 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.192 | H-atom parameters constrained |
S = 0.89 | w = 1/[σ2(Fo2) + (0.1022P)2] where P = (Fo2 + 2Fc2)/3 |
3449 reflections | (Δ/σ)max < 0.001 |
217 parameters | Δρmax = 1.12 e Å−3 |
0 restraints | Δρmin = −0.37 e Å−3 |
C15H15ClN2O5S | V = 1628.89 (15) Å3 |
Mr = 370.80 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 8.6049 (5) Å | µ = 0.39 mm−1 |
b = 7.1949 (3) Å | T = 296 K |
c = 26.8195 (15) Å | 0.48 × 0.24 × 0.02 mm |
β = 101.186 (4)° |
Stoe IPDS 2 diffractometer | 3449 independent reflections |
Absorption correction: integration (X-RED32; Stoe & Cie, 2002) | 1564 reflections with I > 2σ(I) |
Tmin = 0.894, Tmax = 0.992 | Rint = 0.090 |
13941 measured reflections |
R[F2 > 2σ(F2)] = 0.068 | 0 restraints |
wR(F2) = 0.192 | H-atom parameters constrained |
S = 0.89 | Δρmax = 1.12 e Å−3 |
3449 reflections | Δρmin = −0.37 e Å−3 |
217 parameters |
Geometry. All s.u.'s (except the s.u. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell s.u.'s are taken into account individually in the estimation of s.u.'s in distances, angles and torsion angles; correlations between s.u.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell s.u.'s is used for estimating s.u.'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 > 2σ(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 | ||
C1 | 0.5887 (5) | 0.4475 (7) | 0.44296 (17) | 0.0556 (12) | |
C2 | 0.5543 (5) | 0.2605 (7) | 0.44330 (18) | 0.0618 (13) | |
H2 | 0.4667 | 0.2139 | 0.4209 | 0.074* | |
C3 | 0.6482 (6) | 0.1425 (7) | 0.47633 (17) | 0.0616 (13) | |
H3 | 0.6257 | 0.0161 | 0.4764 | 0.074* | |
C4 | 0.7759 (5) | 0.2143 (7) | 0.50928 (17) | 0.0579 (12) | |
C5 | 0.8113 (5) | 0.4015 (8) | 0.51046 (17) | 0.0630 (13) | |
H5 | 0.8979 | 0.4474 | 0.5334 | 0.076* | |
C6 | 0.7182 (5) | 0.5177 (7) | 0.47768 (18) | 0.0608 (13) | |
H6 | 0.7405 | 0.6443 | 0.4783 | 0.073* | |
C7 | 0.7168 (6) | 0.6656 (7) | 0.34900 (18) | 0.0594 (12) | |
H7A | 0.7832 | 0.6501 | 0.3824 | 0.071* | |
H7B | 0.7080 | 0.7971 | 0.3410 | 0.071* | |
C8 | 0.7840 (5) | 0.5617 (6) | 0.30954 (17) | 0.0573 (12) | |
C9 | 0.9556 (6) | 0.5353 (7) | 0.3091 (2) | 0.0727 (15) | |
H9 | 1.0398 | 0.5502 | 0.3363 | 0.087* | |
C10 | 0.9638 (6) | 0.4871 (8) | 0.2628 (2) | 0.0741 (15) | |
H10 | 1.0550 | 0.4557 | 0.2510 | 0.089* | |
C11 | 0.7968 (6) | 0.4919 (7) | 0.23212 (18) | 0.0599 (12) | |
C12 | 0.7102 (6) | 0.3187 (7) | 0.2476 (2) | 0.0691 (14) | |
H12A | 0.6075 | 0.3012 | 0.2257 | 0.083* | |
H12B | 0.7730 | 0.2068 | 0.2476 | 0.083* | |
C13 | 0.6946 (6) | 0.3746 (6) | 0.30125 (18) | 0.0594 (12) | |
C14 | 0.5329 (5) | 0.4221 (7) | 0.31263 (18) | 0.0613 (12) | |
H14A | 0.4592 | 0.4537 | 0.2816 | 0.074* | |
H14B | 0.4906 | 0.3178 | 0.3286 | 0.074* | |
C15 | 0.7767 (7) | 0.5299 (9) | 0.1765 (2) | 0.0832 (17) | |
H15A | 0.8270 | 0.6456 | 0.1714 | 0.100* | |
H15B | 0.6659 | 0.5372 | 0.1618 | 0.100* | |
H15C | 0.8244 | 0.4314 | 0.1605 | 0.100* | |
N1 | 0.8795 (6) | 0.0885 (8) | 0.54414 (17) | 0.0793 (13) | |
N2 | 0.5591 (4) | 0.5831 (5) | 0.34738 (13) | 0.0522 (9) | |
O1 | 0.8474 (6) | −0.0760 (7) | 0.54284 (18) | 0.1241 (18) | |
O2 | 0.9903 (6) | 0.1529 (6) | 0.57330 (19) | 0.1193 (17) | |
O3 | 0.4999 (4) | 0.7806 (5) | 0.41540 (13) | 0.0780 (10) | |
O4 | 0.3234 (4) | 0.5168 (6) | 0.38233 (13) | 0.0780 (11) | |
O5 | 0.7281 (4) | 0.6367 (4) | 0.25862 (11) | 0.0637 (9) | |
S1 | 0.47826 (14) | 0.59405 (19) | 0.39663 (5) | 0.0621 (4) | |
Cl1 | 0.79058 (18) | 0.2099 (2) | 0.34891 (6) | 0.0899 (5) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.050 (2) | 0.063 (3) | 0.052 (3) | −0.006 (2) | 0.007 (2) | −0.009 (2) |
C2 | 0.055 (3) | 0.072 (4) | 0.054 (3) | −0.019 (2) | 0.002 (2) | −0.012 (2) |
C3 | 0.072 (3) | 0.059 (3) | 0.053 (3) | −0.020 (2) | 0.011 (2) | −0.006 (2) |
C4 | 0.058 (3) | 0.066 (3) | 0.048 (3) | −0.005 (2) | 0.007 (2) | 0.003 (2) |
C5 | 0.057 (3) | 0.079 (4) | 0.049 (3) | −0.017 (3) | 0.001 (2) | −0.004 (3) |
C6 | 0.062 (3) | 0.064 (3) | 0.055 (3) | −0.015 (2) | 0.009 (2) | −0.009 (2) |
C7 | 0.067 (3) | 0.049 (3) | 0.058 (3) | −0.011 (2) | 0.001 (2) | −0.006 (2) |
C8 | 0.054 (3) | 0.052 (3) | 0.061 (3) | −0.002 (2) | −0.002 (2) | −0.004 (2) |
C9 | 0.057 (3) | 0.073 (4) | 0.086 (4) | −0.014 (3) | 0.007 (3) | 0.000 (3) |
C10 | 0.065 (3) | 0.069 (4) | 0.090 (4) | −0.007 (3) | 0.018 (3) | 0.001 (3) |
C11 | 0.069 (3) | 0.050 (3) | 0.061 (3) | 0.005 (2) | 0.014 (2) | −0.003 (2) |
C12 | 0.066 (3) | 0.060 (3) | 0.079 (4) | −0.002 (3) | 0.007 (3) | −0.018 (3) |
C13 | 0.070 (3) | 0.045 (3) | 0.066 (3) | −0.004 (2) | 0.018 (2) | −0.004 (2) |
C14 | 0.058 (3) | 0.056 (3) | 0.066 (3) | −0.002 (2) | 0.000 (2) | −0.018 (2) |
C15 | 0.100 (4) | 0.081 (4) | 0.071 (4) | 0.009 (3) | 0.022 (3) | 0.002 (3) |
N1 | 0.085 (3) | 0.083 (4) | 0.064 (3) | −0.015 (3) | −0.001 (2) | 0.008 (3) |
N2 | 0.0494 (19) | 0.054 (2) | 0.050 (2) | −0.0019 (18) | 0.0006 (16) | −0.0083 (18) |
O1 | 0.158 (4) | 0.077 (3) | 0.110 (4) | −0.019 (3) | −0.042 (3) | 0.016 (3) |
O2 | 0.111 (3) | 0.097 (3) | 0.122 (4) | −0.026 (3) | −0.047 (3) | 0.024 (3) |
O3 | 0.084 (2) | 0.073 (2) | 0.073 (2) | 0.0175 (19) | 0.0053 (18) | −0.0221 (19) |
O4 | 0.0455 (18) | 0.107 (3) | 0.078 (2) | 0.0014 (18) | 0.0031 (16) | −0.012 (2) |
O5 | 0.076 (2) | 0.054 (2) | 0.0566 (19) | 0.0075 (16) | 0.0016 (16) | 0.0036 (15) |
S1 | 0.0529 (7) | 0.0696 (9) | 0.0603 (7) | 0.0052 (6) | 0.0027 (5) | −0.0132 (7) |
Cl1 | 0.1013 (11) | 0.0687 (9) | 0.1046 (12) | 0.0213 (8) | 0.0322 (9) | 0.0296 (8) |
C1—C2 | 1.378 (7) | C10—C11 | 1.512 (7) |
C1—C6 | 1.401 (6) | C10—H10 | 0.9300 |
C1—S1 | 1.761 (5) | C11—O5 | 1.450 (5) |
C2—C3 | 1.372 (7) | C11—C15 | 1.494 (7) |
C2—H2 | 0.9300 | C11—C12 | 1.549 (7) |
C3—C4 | 1.371 (6) | C12—C13 | 1.524 (7) |
C3—H3 | 0.9300 | C12—H12A | 0.9700 |
C4—C5 | 1.380 (7) | C12—H12B | 0.9700 |
C4—N1 | 1.471 (7) | C13—C14 | 1.520 (6) |
C5—C6 | 1.357 (7) | C13—Cl1 | 1.819 (5) |
C5—H5 | 0.9300 | C14—N2 | 1.476 (5) |
C6—H6 | 0.9300 | C14—H14A | 0.9700 |
C7—N2 | 1.474 (6) | C14—H14B | 0.9700 |
C7—C8 | 1.500 (7) | C15—H15A | 0.9600 |
C7—H7A | 0.9700 | C15—H15B | 0.9600 |
C7—H7B | 0.9700 | C15—H15C | 0.9600 |
C8—O5 | 1.460 (5) | N1—O2 | 1.202 (6) |
C8—C9 | 1.492 (7) | N1—O1 | 1.214 (6) |
C8—C13 | 1.545 (6) | N2—S1 | 1.610 (4) |
C9—C10 | 1.302 (7) | O3—S1 | 1.433 (4) |
C9—H9 | 0.9300 | O4—S1 | 1.426 (3) |
C2—C1—C6 | 119.5 (4) | C15—C11—C12 | 116.5 (4) |
C2—C1—S1 | 120.1 (3) | C10—C11—C12 | 107.0 (4) |
C6—C1—S1 | 120.3 (4) | C13—C12—C11 | 100.1 (4) |
C3—C2—C1 | 120.5 (4) | C13—C12—H12A | 111.7 |
C3—C2—H2 | 119.7 | C11—C12—H12A | 111.7 |
C1—C2—H2 | 119.7 | C13—C12—H12B | 111.7 |
C4—C3—C2 | 118.8 (5) | C11—C12—H12B | 111.7 |
C4—C3—H3 | 120.6 | H12A—C12—H12B | 109.5 |
C2—C3—H3 | 120.6 | C14—C13—C12 | 120.0 (4) |
C3—C4—C5 | 121.9 (5) | C14—C13—C8 | 103.0 (4) |
C3—C4—N1 | 119.3 (5) | C12—C13—C8 | 103.5 (4) |
C5—C4—N1 | 118.8 (4) | C14—C13—Cl1 | 108.3 (3) |
C6—C5—C4 | 119.1 (4) | C12—C13—Cl1 | 112.4 (3) |
C6—C5—H5 | 120.4 | C8—C13—Cl1 | 108.7 (3) |
C4—C5—H5 | 120.4 | N2—C14—C13 | 105.7 (4) |
C5—C6—C1 | 120.2 (5) | N2—C14—H14A | 110.6 |
C5—C6—H6 | 119.9 | C13—C14—H14A | 110.6 |
C1—C6—H6 | 119.9 | N2—C14—H14B | 110.6 |
N2—C7—C8 | 104.9 (3) | C13—C14—H14B | 110.6 |
N2—C7—H7A | 110.8 | H14A—C14—H14B | 108.7 |
C8—C7—H7A | 110.8 | C11—C15—H15A | 109.5 |
N2—C7—H7B | 110.8 | C11—C15—H15B | 109.5 |
C8—C7—H7B | 110.8 | H15A—C15—H15B | 109.5 |
H7A—C7—H7B | 108.8 | C11—C15—H15C | 109.5 |
O5—C8—C9 | 100.7 (4) | H15A—C15—H15C | 109.5 |
O5—C8—C7 | 111.9 (4) | H15B—C15—H15C | 109.5 |
C9—C8—C7 | 126.0 (4) | O2—N1—O1 | 122.8 (5) |
O5—C8—C13 | 97.0 (3) | O2—N1—C4 | 118.9 (5) |
C9—C8—C13 | 110.7 (4) | O1—N1—C4 | 118.4 (4) |
C7—C8—C13 | 106.6 (4) | C7—N2—C14 | 111.2 (3) |
C10—C9—C8 | 106.2 (5) | C7—N2—S1 | 119.9 (3) |
C10—C9—H9 | 126.9 | C14—N2—S1 | 121.3 (3) |
C8—C9—H9 | 126.9 | C11—O5—C8 | 95.8 (3) |
C9—C10—C11 | 107.0 (5) | O4—S1—O3 | 120.7 (2) |
C9—C10—H10 | 126.5 | O4—S1—N2 | 106.86 (19) |
C11—C10—H10 | 126.5 | O3—S1—N2 | 106.7 (2) |
O5—C11—C15 | 112.3 (4) | O4—S1—C1 | 107.7 (2) |
O5—C11—C10 | 100.6 (4) | O3—S1—C1 | 107.3 (2) |
C15—C11—C10 | 117.5 (4) | N2—S1—C1 | 106.8 (2) |
O5—C11—C12 | 100.6 (4) | ||
C6—C1—C2—C3 | −1.8 (7) | O5—C8—C13—Cl1 | 159.5 (3) |
S1—C1—C2—C3 | 174.2 (4) | C9—C8—C13—Cl1 | 55.2 (5) |
C1—C2—C3—C4 | 0.6 (7) | C7—C8—C13—Cl1 | −85.1 (4) |
C2—C3—C4—C5 | 0.7 (7) | C12—C13—C14—N2 | −139.8 (4) |
C2—C3—C4—N1 | −178.7 (4) | C8—C13—C14—N2 | −25.7 (5) |
C3—C4—C5—C6 | −0.8 (7) | Cl1—C13—C14—N2 | 89.3 (4) |
N1—C4—C5—C6 | 178.6 (4) | C3—C4—N1—O2 | −179.2 (5) |
C4—C5—C6—C1 | −0.4 (7) | C5—C4—N1—O2 | 1.4 (8) |
C2—C1—C6—C5 | 1.7 (7) | C3—C4—N1—O1 | −0.6 (8) |
S1—C1—C6—C5 | −174.3 (4) | C5—C4—N1—O1 | 180.0 (5) |
N2—C7—C8—O5 | 83.0 (4) | C8—C7—N2—C14 | 5.6 (5) |
N2—C7—C8—C9 | −154.3 (4) | C8—C7—N2—S1 | 155.4 (3) |
N2—C7—C8—C13 | −21.9 (5) | C13—C14—N2—C7 | 13.2 (5) |
O5—C8—C9—C10 | −34.8 (5) | C13—C14—N2—S1 | −136.2 (3) |
C7—C8—C9—C10 | −162.2 (5) | C15—C11—O5—C8 | −174.7 (4) |
C13—C8—C9—C10 | 67.1 (5) | C10—C11—O5—C8 | −48.9 (4) |
C8—C9—C10—C11 | 2.9 (6) | C12—C11—O5—C8 | 60.7 (4) |
C9—C10—C11—O5 | 30.0 (5) | C9—C8—O5—C11 | 51.2 (4) |
C9—C10—C11—C15 | 152.2 (5) | C7—C8—O5—C11 | −172.7 (4) |
C9—C10—C11—C12 | −74.5 (5) | C13—C8—O5—C11 | −61.6 (4) |
O5—C11—C12—C13 | −33.9 (4) | C7—N2—S1—O4 | 175.4 (3) |
C15—C11—C12—C13 | −155.5 (4) | C14—N2—S1—O4 | −37.8 (4) |
C10—C11—C12—C13 | 70.7 (5) | C7—N2—S1—O3 | 45.1 (4) |
C11—C12—C13—C14 | 110.0 (5) | C14—N2—S1—O3 | −168.1 (3) |
C11—C12—C13—C8 | −3.9 (5) | C7—N2—S1—C1 | −69.4 (4) |
C11—C12—C13—Cl1 | −121.0 (4) | C14—N2—S1—C1 | 77.3 (4) |
O5—C8—C13—C14 | −85.8 (4) | C2—C1—S1—O4 | 28.7 (5) |
C9—C8—C13—C14 | 169.9 (4) | C6—C1—S1—O4 | −155.3 (4) |
C7—C8—C13—C14 | 29.7 (5) | C2—C1—S1—O3 | 160.1 (4) |
O5—C8—C13—C12 | 39.9 (4) | C6—C1—S1—O3 | −23.9 (4) |
C9—C8—C13—C12 | −64.4 (5) | C2—C1—S1—N2 | −85.8 (4) |
C7—C8—C13—C12 | 155.3 (4) | C6—C1—S1—N2 | 90.2 (4) |
D—H···A | D—H | H···A | D···A | D—H···A |
C3—H3···O3i | 0.93 | 2.46 | 3.205 (6) | 138 |
C7—H7A···O2ii | 0.97 | 2.51 | 3.219 (6) | 129 |
C9—H9···O4iii | 0.93 | 2.52 | 3.388 (6) | 155 |
Symmetry codes: (i) x, y−1, z; (ii) −x+2, −y+1, −z+1; (iii) x+1, y, z. |
D—H···A | D—H | H···A | D···A | D—H···A |
C3—H3···O3i | 0.93 | 2.46 | 3.205 (6) | 137.7 |
C7—H7A···O2ii | 0.97 | 2.51 | 3.219 (6) | 129.4 |
C9—H9···O4iii | 0.93 | 2.52 | 3.388 (6) | 154.9 |
Symmetry codes: (i) x, y−1, z; (ii) −x+2, −y+1, −z+1; (iii) x+1, y, z. |
Acknowledgements
The authors acknowledge the Faculty of Arts and Sciences, Ondokuz Mayıs University, Turkey, for the use of the diffractometer (purchased under grant F.279 of University Research Fund) and also The Scientific & Technological Research Council of Turkey (TÜBİTAK) for the financial support of this work (P·N.: 107 T831).
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This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
The use of protective groups has been popular in synthetic pathways (Romanski et al., 2012; Chan & White, 2004; Yasushi and Higuchi, 2006; Blanc and Bochet, 2007). Many protective groups have been, developed to block other reactive sites of a molecule like NH, OH, SH, aldehyde etc. They should be easily removable (Greene & Wuts, 1999). Bulky protective groups on nitrogen like tert-butoxy carboxylate (Demircan and Parsons, 2002), the trityl group (Demirtaş et al., 2002), tosyl (Katritzky et al., 2004), mesyl (Merlin et al., 1988) predominates in cycloaddition reactions over relatively small protective groups such as methyl, ethyl groups.
We have been working on intramolecular Diels Alder reaction (IMDAF) of compounds with a furan core using different side chains containing a heteroatom like oxygen, sulfur and nitrogen. Isoindole derivatives have been often synthesized and analyzed in our group using bulky protective groups (Büyükgüngör et al., 2005; Koşar et al., 2006a; Koşar et al., 2006b; Karaarslan et al., 2007; Demircan et al., 2011). Tosyl and mesyl groups have been previously used and reported in a series of sulfonamides (Temel et al., 2012; Temel et al., 2011). We now here report our further finding that cycloadduct, 3 with p-nosyl group was generated at the intermediate via, 2 in aqueous condition without any other solvent system.
The title compound contains epoxyisoindole and phenyl rings linked through N—S—C bridge (Fig. 2). Tetrahydrofuran rings, pyrrolidine ring and six-membered ring that generate epoxyisoindole moiety are puckered. Both tetrahydrofuran rings adopt an envelope conformation with the puckering parameters of Q=0.516 (5) Å, ϕ=182.8 (6)° for O5/C8–11 and Q=0.611 (5) Å, ϕ=3.5 (5)° for O5/C8,13,12,11, respectively. The other five-membered ring, pyrrolidine, has the puckering parameters of Q=0.288 (5) Å and ϕ=277.2 (9)°. The six-membered ring, C8–13, has a boat conformation, according to the puckering parameters [Q=0.928 (5) Å, θ=87.5 (3)° and ϕ=180.8 (3)°] (Cremer & Pople, 1975).
The crystal packing of is stabilized by C—H···O hydrogen bonds. While the C7—H7A···O2 hydrogen bonds generate R22(20) rings, the combination of C7—H7A···O2 and C9—H9···O4 hydrogen bonds generate R44(26) rings (Fig. 4). These adjacent rings are running parallel to ac-plane. Additionally, C3—H3···O3 hydrogen bonds forming a C(6) chain link the molecules through b axis (Fig 3) (Bernstein et al. 1995).