Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S160053680503028X/ac6202sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S160053680503028X/ac6202Isup2.hkl |
CCDC reference: 287433
Potassium hydroxide (1.25 g) dissolved in water (5 ml) was added to tropinone (0.418 g, 3 mmol) and thiophene-3-carboxaldehyde (0.673 g, 6 mmol) dissolved in alcohol Ethanol? (20 ml), and the solution was then boiled under reflux for 1 h. After cooling the reaction mixture to room temperature, crystals separated and were collected by filtration and washed with water. Recrystallization from ethyl acetate afforded (I) as brown needles which were suitable for X-ray analysis. Spectroscopic analysis: 1H NMR (CDCl3, δ, p.p.m.): 1.94 (m, 2H), 2.38 (s, 3H), 2.61 (m, 2H), 4.48 (m, 2H), 7.23 (dd, 2H), 7.39 (q, 2H), 7.45 (m, 2H), 7.77 (s, 2H); 13C NMR (CDCl3, δ, p.p.m.): 30.3, 36.4, 61.5, 126.3, 128.3, 129.2, 130.1, 136.9, 137.1, 187.5.
H atoms were placed in idealized positions and were constrained, with C—H distances of 0.99, 0.98 and 0.95 Å for methyl, sp and sp2 C atoms, respectively, and with Uiso(H) = 1.2Ueq(C), or 1.5Ueq(C) for methyl H atoms. The Flack x(u) parameter (Flack, 1983) refined to 0.47 (9) and was subsequently fixed at 0.5. The crystals are inversion twins. Disorder of the thiophene ring is common in this sort of molecule. The geometries of the two PARTs were kept similar using the SAME restraint and displacement parameters in these disordered pieces were restrained using both ISOR and SIMU. In addition, the components of anisotropic displacement for disordered atoms occupying approximately the same site were made equal using the EADP constraint.
Data collection: COLLECT (Nonius, 1999); cell refinement: SCALEPACK (Otwinowski & Minor, 1997); data reduction: DENZO-SMN (Otwinowski & Minor, 1997); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: XP in SHELXTL (Sheldrick, 1995); software used to prepare material for publication: SHELXL97 and local procedures.
C18H17NOS2 | F(000) = 688 |
Mr = 327.45 | Dx = 1.450 Mg m−3 |
Orthorhombic, Cmc21 | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: C 2c -2 | Cell parameters from 994 reflections |
a = 19.3783 (4) Å | θ = 1.0–27.5° |
b = 10.5680 (6) Å | µ = 0.36 mm−1 |
c = 7.3257 (3) Å | T = 90 K |
V = 1500.23 (11) Å3 | Irregular fragment, brown |
Z = 4 | 0.25 × 0.20 × 0.15 mm |
Nonius KappaCCD area-detector diffractometer | 1668 independent reflections |
Radiation source: fine-focus sealed tube | 1551 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.036 |
Detector resolution: 18 pixels mm-1 | θmax = 27.5°, θmin = 2.1° |
ω scans at fixed χ = 55° | h = −24→25 |
Absorption correction: multi-scan (SCALEPACK, Version 0.95.373; Otwinowski & Minor, 1997) | k = −13→13 |
Tmin = 0.916, Tmax = 0.949 | l = −9→9 |
1668 measured reflections |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.031 | H-atom parameters constrained |
wR(F2) = 0.074 | w = 1/[σ2(Fo2) + (0.0376P)2 + 0.3768P] where P = (Fo2 + 2Fc2)/3 |
S = 1.08 | (Δ/σ)max = 0.001 |
1668 reflections | Δρmax = 0.23 e Å−3 |
144 parameters | Δρmin = −0.20 e Å−3 |
186 restraints | Absolute structure: Flack (1983), with how many Friedel pairs |
Primary atom site location: structure-invariant direct methods | Absolute structure parameter: 0.47 (9) |
C18H17NOS2 | V = 1500.23 (11) Å3 |
Mr = 327.45 | Z = 4 |
Orthorhombic, Cmc21 | Mo Kα radiation |
a = 19.3783 (4) Å | µ = 0.36 mm−1 |
b = 10.5680 (6) Å | T = 90 K |
c = 7.3257 (3) Å | 0.25 × 0.20 × 0.15 mm |
Nonius KappaCCD area-detector diffractometer | 1668 independent reflections |
Absorption correction: multi-scan (SCALEPACK, Version 0.95.373; Otwinowski & Minor, 1997) | 1551 reflections with I > 2σ(I) |
Tmin = 0.916, Tmax = 0.949 | Rint = 0.036 |
1668 measured reflections |
R[F2 > 2σ(F2)] = 0.031 | H-atom parameters constrained |
wR(F2) = 0.074 | Δρmax = 0.23 e Å−3 |
S = 1.08 | Δρmin = −0.20 e Å−3 |
1668 reflections | Absolute structure: Flack (1983), with how many Friedel pairs |
144 parameters | Absolute structure parameter: 0.47 (9) |
186 restraints |
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. Flack's x(u) parameter refined to 0.47 (9) and was subsequently fixed at 0.5. The crystals are inversion twins. |
x | y | z | Uiso*/Ueq | Occ. (<1) | |
O1 | 1.0000 | 1.04922 (15) | 0.7913 (3) | 0.0239 (4) | |
N1 | 1.0000 | 0.67138 (18) | 0.8054 (3) | 0.0157 (4) | |
C1 | 1.0000 | 0.9364 (2) | 0.7552 (3) | 0.0165 (5) | |
C2 | 0.93431 (8) | 0.86450 (14) | 0.7290 (3) | 0.0155 (3) | |
C3 | 0.94082 (8) | 0.72283 (14) | 0.7042 (3) | 0.0152 (3) | |
H3 | 0.8972 | 0.6795 | 0.7421 | 0.018* | |
C4 | 0.95997 (8) | 0.68646 (16) | 0.5066 (3) | 0.0182 (4) | |
H4A | 0.9417 | 0.7492 | 0.4186 | 0.022* | |
H4B | 0.9417 | 0.6018 | 0.4751 | 0.022* | |
C5 | 1.0000 | 0.6941 (2) | 1.0032 (3) | 0.0201 (5) | |
H5A | 0.9933 | 0.7846 | 1.0268 | 0.030* | 0.50 |
H5B | 1.0442 | 0.6669 | 1.0549 | 0.030* | 0.50 |
H5C | 0.9625 | 0.6460 | 1.0599 | 0.030* | 0.50 |
C6 | 0.87556 (8) | 0.93268 (15) | 0.7284 (2) | 0.0160 (3) | |
H6 | 0.8813 | 1.0203 | 0.7532 | 0.019* | |
C7 | 0.80459 (7) | 0.89298 (15) | 0.6955 (3) | 0.0144 (3) | 0.604 (2) |
C8 | 0.7817 (6) | 0.7892 (12) | 0.607 (3) | 0.0135 (13) | 0.604 (2) |
H8 | 0.8119 | 0.7276 | 0.5566 | 0.016* | 0.604 (2) |
S1 | 0.69352 (6) | 0.77756 (15) | 0.5917 (2) | 0.0162 (3) | 0.604 (2) |
C9 | 0.6851 (4) | 0.9185 (10) | 0.7108 (17) | 0.0176 (16) | 0.604 (2) |
H9 | 0.6420 | 0.9539 | 0.7448 | 0.021* | 0.604 (2) |
C10 | 0.7459 (4) | 0.9719 (11) | 0.7496 (19) | 0.0136 (12) | 0.604 (2) |
H10 | 0.7505 | 1.0523 | 0.8062 | 0.016* | 0.604 (2) |
C7' | 0.80459 (7) | 0.89298 (15) | 0.6955 (3) | 0.0144 (3) | 0.396 (2) |
C8' | 0.7535 (6) | 0.9653 (16) | 0.754 (3) | 0.0143 (18) | 0.396 (2) |
H8' | 0.7607 | 1.0396 | 0.8246 | 0.017* | 0.396 (2) |
S1' | 0.67364 (15) | 0.9136 (4) | 0.6918 (6) | 0.0170 (5) | 0.396 (2) |
C9' | 0.7115 (4) | 0.7811 (11) | 0.593 (2) | 0.0203 (18) | 0.396 (2) |
H9' | 0.6852 | 0.7156 | 0.5374 | 0.024* | 0.396 (2) |
C10' | 0.7801 (9) | 0.7786 (19) | 0.600 (4) | 0.0135 (18) | 0.396 (2) |
H10' | 0.8087 | 0.7136 | 0.5522 | 0.016* | 0.396 (2) |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0190 (8) | 0.0157 (8) | 0.0368 (10) | 0.000 | 0.000 | −0.0037 (7) |
N1 | 0.0137 (8) | 0.0159 (9) | 0.0176 (10) | 0.000 | 0.000 | 0.0012 (8) |
C1 | 0.0157 (10) | 0.0143 (9) | 0.0195 (12) | 0.000 | 0.000 | −0.0001 (9) |
C2 | 0.0155 (7) | 0.0157 (7) | 0.0152 (9) | −0.0010 (6) | 0.0005 (6) | 0.0005 (6) |
C3 | 0.0126 (7) | 0.0141 (7) | 0.0188 (9) | −0.0009 (5) | −0.0010 (7) | 0.0001 (7) |
C4 | 0.0211 (9) | 0.0151 (7) | 0.0183 (9) | −0.0001 (6) | −0.0028 (7) | −0.0012 (7) |
C5 | 0.0194 (11) | 0.0224 (11) | 0.0185 (12) | 0.000 | 0.000 | 0.0005 (10) |
C6 | 0.0175 (7) | 0.0141 (7) | 0.0165 (9) | −0.0011 (6) | 0.0004 (6) | 0.0016 (7) |
C7 | 0.0154 (7) | 0.0144 (7) | 0.0135 (8) | 0.0017 (5) | −0.0004 (7) | 0.0037 (6) |
C8 | 0.0128 (16) | 0.014 (2) | 0.014 (2) | 0.0028 (15) | 0.0004 (16) | 0.0019 (19) |
S1 | 0.0143 (5) | 0.0170 (4) | 0.0172 (4) | −0.0009 (4) | −0.0013 (5) | 0.0000 (3) |
C9 | 0.021 (2) | 0.016 (2) | 0.016 (3) | 0.0041 (19) | 0.002 (2) | −0.0008 (16) |
C10 | 0.0132 (19) | 0.0127 (18) | 0.015 (2) | 0.0085 (14) | −0.0019 (17) | −0.0005 (15) |
C7' | 0.0154 (7) | 0.0144 (7) | 0.0135 (8) | 0.0017 (5) | −0.0004 (7) | 0.0037 (6) |
C8' | 0.014 (2) | 0.015 (3) | 0.014 (3) | −0.003 (2) | −0.002 (2) | 0.002 (2) |
S1' | 0.0120 (8) | 0.0204 (8) | 0.0186 (11) | −0.0020 (7) | −0.0007 (8) | 0.0004 (7) |
C9' | 0.025 (3) | 0.018 (2) | 0.018 (3) | −0.001 (2) | 0.002 (3) | −0.0030 (18) |
C10' | 0.017 (2) | 0.013 (3) | 0.011 (3) | −0.0022 (19) | 0.000 (2) | −0.002 (2) |
O1—C1 | 1.221 (3) | C6—C7 | 1.458 (2) |
N1—C5 | 1.469 (3) | C6—H6 | 0.9500 |
N1—C3i | 1.470 (2) | C7—C8 | 1.350 (10) |
N1—C3 | 1.470 (2) | C7—C10 | 1.465 (8) |
C1—C2i | 1.4951 (19) | C8—S1 | 1.716 (11) |
C1—C2 | 1.4952 (19) | C8—H8 | 0.9500 |
C2—C6 | 1.347 (2) | S1—C9 | 1.733 (9) |
C2—C3 | 1.513 (2) | C9—C10 | 1.337 (12) |
C3—C4 | 1.543 (3) | C9—H9 | 0.9500 |
C3—H3 | 1.0000 | C10—H10 | 0.9500 |
C4—C4i | 1.552 (3) | C8'—S1' | 1.704 (14) |
C4—H4A | 0.9900 | C8'—H8' | 0.9500 |
C4—H4B | 0.9900 | S1'—C9' | 1.740 (10) |
C5—H5A | 0.9800 | C9'—C10' | 1.331 (18) |
C5—H5B | 0.9800 | C9'—H9' | 0.9500 |
C5—H5C | 0.9800 | C10'—H10' | 0.9500 |
C5—N1—C3i | 115.92 (13) | H5A—C5—H5C | 109.5 |
C5—N1—C3 | 115.92 (13) | H5B—C5—H5C | 109.5 |
C3i—N1—C3 | 102.55 (18) | C2—C6—C7 | 130.07 (14) |
O1—C1—C2i | 121.63 (9) | C2—C6—H6 | 115.0 |
O1—C1—C2 | 121.62 (9) | C7—C6—H6 | 115.0 |
C2i—C1—C2 | 116.72 (19) | C8—C7—C6 | 128.6 (5) |
C6—C2—C1 | 116.60 (15) | C8—C7—C10 | 109.7 (4) |
C6—C2—C3 | 126.81 (14) | C6—C7—C10 | 121.6 (4) |
C1—C2—C3 | 116.58 (14) | C7—C8—S1 | 114.6 (7) |
N1—C3—C2 | 111.75 (15) | C7—C8—H8 | 122.7 |
N1—C3—C4 | 101.15 (13) | S1—C8—H8 | 122.7 |
C2—C3—C4 | 112.28 (14) | C8—S1—C9 | 90.0 (4) |
N1—C3—H3 | 110.4 | C10—C9—S1 | 112.8 (7) |
C2—C3—H3 | 110.4 | C10—C9—H9 | 123.6 |
C4—C3—H3 | 110.4 | S1—C9—H9 | 123.6 |
C3—C4—C4i | 103.92 (8) | C9—C10—C7 | 112.7 (8) |
C3—C4—H4A | 111.0 | C9—C10—H10 | 123.7 |
C4i—C4—H4A | 111.0 | C7—C10—H10 | 123.7 |
C3—C4—H4B | 111.0 | S1'—C8'—H8' | 123.0 |
C4i—C4—H4B | 111.0 | C8'—S1'—C9' | 89.2 (6) |
H4A—C4—H4B | 109.0 | C10'—C9'—S1' | 114.8 (9) |
N1—C5—H5A | 109.5 | C10'—C9'—H9' | 122.6 |
N1—C5—H5B | 109.5 | S1'—C9'—H9' | 122.6 |
H5A—C5—H5B | 109.5 | C9'—C10'—H10' | 125.5 |
N1—C5—H5C | 109.5 | ||
O1—C1—C2—C6 | 6.6 (3) | C2—C3—C4—C4i | 89.51 (11) |
C2i—C1—C2—C6 | −171.36 (13) | C1—C2—C6—C7 | 175.88 (18) |
O1—C1—C2—C3 | −173.9 (2) | C3—C2—C6—C7 | −3.5 (3) |
C2i—C1—C2—C3 | 8.1 (3) | C2—C6—C7—C8 | −21.6 (12) |
C5—N1—C3—C2 | 58.0 (2) | C2—C6—C7—C10 | 162.7 (7) |
C3i—N1—C3—C2 | −69.3 (2) | C6—C7—C8—S1 | −178.5 (5) |
C5—N1—C3—C4 | 177.69 (15) | C10—C7—C8—S1 | −2.3 (17) |
C3i—N1—C3—C4 | 50.38 (18) | C7—C8—S1—C9 | −0.2 (14) |
C6—C2—C3—N1 | −148.89 (17) | C8—S1—C9—C10 | 2.9 (13) |
C1—C2—C3—N1 | 31.7 (2) | S1—C9—C10—C7 | −4.8 (15) |
C6—C2—C3—C4 | 98.2 (2) | C8—C7—C10—C9 | 4.6 (17) |
C1—C2—C3—C4 | −81.18 (19) | C6—C7—C10—C9 | −178.9 (9) |
N1—C3—C4—C4i | −29.76 (11) | C8'—S1'—C9'—C10' | −2 (2) |
Symmetry code: (i) −x+2, y, z. |
Experimental details
Crystal data | |
Chemical formula | C18H17NOS2 |
Mr | 327.45 |
Crystal system, space group | Orthorhombic, Cmc21 |
Temperature (K) | 90 |
a, b, c (Å) | 19.3783 (4), 10.5680 (6), 7.3257 (3) |
V (Å3) | 1500.23 (11) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.36 |
Crystal size (mm) | 0.25 × 0.20 × 0.15 |
Data collection | |
Diffractometer | Nonius KappaCCD area-detector diffractometer |
Absorption correction | Multi-scan (SCALEPACK, Version 0.95.373; Otwinowski & Minor, 1997) |
Tmin, Tmax | 0.916, 0.949 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 1668, 1668, 1551 |
Rint | 0.036 |
(sin θ/λ)max (Å−1) | 0.649 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.031, 0.074, 1.08 |
No. of reflections | 1668 |
No. of parameters | 144 |
No. of restraints | 186 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.23, −0.20 |
Absolute structure | Flack (1983), with how many Friedel pairs |
Absolute structure parameter | 0.47 (9) |
Computer programs: COLLECT (Nonius, 1999), SCALEPACK (Otwinowski & Minor, 1997), DENZO-SMN (Otwinowski & Minor, 1997), SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997), XP in SHELXTL (Sheldrick, 1995), SHELXL97 and local procedures.
O1—C1 | 1.221 (3) | C2—C3 | 1.513 (2) |
N1—C5 | 1.469 (3) | C3—C4 | 1.543 (3) |
N1—C3 | 1.470 (2) | C6—C7 | 1.458 (2) |
C1—C2 | 1.4952 (19) | C8—S1 | 1.716 (11) |
C2—C6 | 1.347 (2) | S1—C9 | 1.733 (9) |
O1—C1—C2 | 121.62 (9) | C8—C7—C6 | 128.6 (5) |
C6—C2—C1 | 116.60 (15) | C7—C8—S1 | 114.6 (7) |
C2—C6—C7 | 130.07 (14) | C8—S1—C9 | 90.0 (4) |
O1—C1—C2—C6 | 6.6 (3) | C2—C6—C7—C8 | −21.6 (12) |
O1—C1—C2—C3 | −173.9 (2) | C2—C6—C7—C10 | 162.7 (7) |
Tropane alkaloids comprise a large group of bases occurring predominantly in the family Solanaceae. Many of these compounds have interesting biological properties. A series of tropanes have showed anticonvulsant activity against pentylenetetrazol-induced convulsions in mice and antiarrhythmic activity in rabbit previously treated with ouabain (Trigo et al., 1981). The title compound, (I), is a synthetic precursor of a drug candidate with defined double-bond geometry and was prepared by the base-catalyzed Aldol condensation of tropinone with thiophene-3-carboxaldehyde to afford a single geometric isomer. The product, the title compound, (I), was identified by NMR spectroscopy. In order to confirm the double-bond geometries and to study the structural conformation of the molecule in the solid state, its X-ray structure determination has been carried out and the results are presented here.
Fig. 1 illustrates a displacement ellipsoid plot of (I), and selected geometric parameters are presented in Table 1. The molecule is symmetric, with both C═C double-bonds adopting the E configuration. Deviations from the ideal bond-angle geometry around the sp2 C atoms of the double bonds are observed. The angles C6═C2—C1, C2═C6—C7 and C8═C7—C6 are distorted because of steric hindrance, due to the double bonds linking the thiophene rings on both sides of the tropinone moiety. These angles have values of 116.60 (15), 130.07 (14) and 128.6 (5)° respectively. The C2═ C6—C7═C8 torsion angle [−21.6 (12)°] indicates a deviation of the plane of the thiophene rings from the plane of the double bonds connecting the rings. The C6—C7 bond length [1.458 (2) Å] is slightly shorter than typical C—C single bonds, suggesting extended conjugation of the thiophene ring π-electron systems with the C2═C6 double bond (Wilson, 1992). The molecule has thienyl-ring flip disorder, the thiophene rings being disordered over two conformations about the C6–C7 bond. The N-methyl group is also disordered.