organic compounds
2-(5-Bromopyridin-3-yl)-5-[3-(4,5,6,7-tetrahydrothieno[3,2-c]pyridine-5-ylsulfonyl)thiophen-2-yl]-1,3,4-oxadiazole
aX-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia, bDepartment of Chemistry, Manipal Institute of Technology, Manipal, India, cMedicinal Chemistry Division, Department of Chemistry, National Institute of Technology, Karnataka, Surathkal, Mangalore 575 025, India, and dDepartment of Printing & Media, Manipal Institute of Technology, Manipal, India
*Correspondence e-mail: hkfun@usm.my
In the title compound, C18H13BrN4O3S3, the tetrahydropyridine ring adopts a half-chair conformation with the central methylene-C atom of the NCH2CH2 unit at the flap. The dihedral angles between the tetrahydropyridine ring and the pyridine and two thiophene rings are 69.34 (13) 5.66 (13) and 68.63 (13)°, respectively, while the dihedral angle between the 1,3,4-oxadiazole and tetrahydropyridine rings is 54.76 (13)°. The molecule is stabilized by an intramolecular C—H⋯N interaction. In the crystal, adjacent molecules are connected via bifurcated C—H⋯(N,O) hydrogen bonds, forming a chain along the b axis.
Related literature
For applications of 4,5,6,7-tetrahydrothieno[3,2-c]pyridine derivatives, see: Lopez-Rodriguez et al. (2001); Roth et al. (1994); Ying & Rusak (1997). For ring see: Cremer & Pople (1975).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2009); cell SAINT (Bruker, 2009); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL and PLATON (Spek, 2009).
Supporting information
https://doi.org/10.1107/S1600536811038529/tk2791sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536811038529/tk2791Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536811038529/tk2791Isup3.cml
To a mixture of 3-(6,7-dihydrothieno[3,2-c]pyridine-5(4H)-ylsulfonyl) thiophene-2-carbohydrazide (0.5 g, 0.0014 mol) and 5-bromopyridine-3-carboxylic acid (0.29 g, 0.0014 mol), neutral alumina (0.5 g) and POCl3, (1.1 g, 0.007 mol) were added. The resulting mixture was irradiated in a microwave oven for 5 min.
of the crude reaction mixture confirmed completion of the reaction. The reaction mixture was concentrated and the residue was purified by to get title compound which was recrystallised using acetone. Yield: 68%, m.p. 429–431 K.All hydrogen atoms were positioned geometrically [C–H = 0.93 or 0.97 Å] and were refined using a riding model, with Uiso(H) = 1.2 Ueq(C).
4,5,6,7-Tetrahydrothieno[3,2-c]pyridine derivatives are extensively studied in medicinal chemistry due to their various biological activities (Lopez-Rodriguez et al., 2001). 4,5,6,7-Tetrahydrothieno[3,2-c] pyridine oxadiazole derivatives are mainly used in CNS functions and disorders such as schizophrenia (Roth et al., 1994), depression, epilepsy, migraine, and control of circadian rhythm (Ying & Rusak, 1997).
The molecular structure of the title compound, Fig. 1, contains five rings, namely, A (N3/C1,C2,C5–C7), B (N1/N2/O1/C12,C13), C (S3/C2–C5), D (S1/C8–C11) and E (N4/C14–C18). The tetrahydropyridine (N3/C1,C2,C5–C7) ring adopts a half-chair conformation with puckering parameters Q = 0.497 (3) Å, θ = 131.5 (3)° and φ = 141.6 (4)° with the flap atom at C7 [maximum deviation of -0.338 (3) Å]. The dihedral angle between the least-squares planes of the rings are A/B = 54.76 (13)°, A/C = 5.66 (13)°, A/D = 68.63 (13)°, A/E = 69.34 (13)°, B/C = 56.97 (14)°, B/D = 13.90 (14)°, B/E = 15.62 (13)°, C/D = 70.85 (13)°, and C/E = 70.88 (13)°.
In the
(Fig. 2), adjacent molecules are connected via bifurcated C—H···N and C—H···O (Table 1) hydrogen bonds forming one-dimensional chains along the b-axis.For applications of 4,5,6,7-tetrahydrothieno[3,2-c]pyridine derivatives, see: Lopez-Rodriguez et al. (2001); Roth et al. (1994); Ying & Rusak (1997). For ring
see: Cremer & Pople (1975).Data collection: APEX2 (Bruker, 2009); cell
SAINT (Bruker, 2009); data reduction: SAINT (Bruker, 2009); program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).C18H13BrN4O3S3 | F(000) = 1024 |
Mr = 509.41 | Dx = 1.703 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 3605 reflections |
a = 7.0327 (14) Å | θ = 2.7–25.9° |
b = 7.6488 (15) Å | µ = 2.41 mm−1 |
c = 36.939 (7) Å | T = 296 K |
β = 91.315 (5)° | Plate, colourless |
V = 1986.5 (7) Å3 | 0.35 × 0.13 × 0.05 mm |
Z = 4 |
Bruker APEXII DUO CCD area-detector diffractometer | 7230 independent reflections |
Radiation source: fine-focus sealed tube | 4160 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.051 |
φ and ω scans | θmax = 32.7°, θmin = 2.2° |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | h = −10→8 |
Tmin = 0.482, Tmax = 0.885 | k = −11→11 |
22958 measured reflections | l = −55→52 |
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)] = 0.046 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.123 | H-atom parameters constrained |
S = 1.02 | w = 1/[σ2(Fo2) + (0.0445P)2 + 0.8759P] where P = (Fo2 + 2Fc2)/3 |
7230 reflections | (Δ/σ)max < 0.001 |
262 parameters | Δρmax = 0.76 e Å−3 |
0 restraints | Δρmin = −0.73 e Å−3 |
C18H13BrN4O3S3 | V = 1986.5 (7) Å3 |
Mr = 509.41 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 7.0327 (14) Å | µ = 2.41 mm−1 |
b = 7.6488 (15) Å | T = 296 K |
c = 36.939 (7) Å | 0.35 × 0.13 × 0.05 mm |
β = 91.315 (5)° |
Bruker APEXII DUO CCD area-detector diffractometer | 7230 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | 4160 reflections with I > 2σ(I) |
Tmin = 0.482, Tmax = 0.885 | Rint = 0.051 |
22958 measured reflections |
R[F2 > 2σ(F2)] = 0.046 | 0 restraints |
wR(F2) = 0.123 | H-atom parameters constrained |
S = 1.02 | Δρmax = 0.76 e Å−3 |
7230 reflections | Δρmin = −0.73 e Å−3 |
262 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 | ||
S1 | 0.93996 (10) | 0.96690 (8) | 0.10025 (2) | 0.04559 (16) | |
S2 | 1.36853 (8) | 0.62674 (8) | 0.146401 (17) | 0.03714 (14) | |
S3 | 1.17503 (12) | 0.51687 (12) | 0.30392 (2) | 0.0593 (2) | |
Br1 | 0.24445 (4) | −0.00049 (4) | 0.017218 (10) | 0.06497 (12) | |
O1 | 0.7735 (2) | 0.6343 (2) | 0.07860 (4) | 0.0371 (4) | |
O2 | 1.5532 (2) | 0.7035 (3) | 0.14769 (5) | 0.0505 (5) | |
O3 | 1.3410 (3) | 0.4632 (2) | 0.12866 (5) | 0.0464 (4) | |
N1 | 0.7985 (3) | 0.3595 (3) | 0.09508 (7) | 0.0503 (6) | |
N2 | 0.9456 (3) | 0.4530 (3) | 0.11199 (7) | 0.0513 (6) | |
N3 | 1.3043 (3) | 0.6029 (3) | 0.18809 (5) | 0.0358 (4) | |
N4 | 0.2436 (3) | 0.5346 (4) | 0.02560 (8) | 0.0582 (6) | |
C1 | 1.3498 (4) | 0.7466 (3) | 0.21341 (7) | 0.0443 (6) | |
H1A | 1.2736 | 0.8485 | 0.2073 | 0.053* | |
H1B | 1.4829 | 0.7781 | 0.2117 | 0.053* | |
C2 | 1.3091 (3) | 0.6885 (3) | 0.25127 (7) | 0.0397 (5) | |
C3 | 1.3612 (4) | 0.7808 (4) | 0.28326 (8) | 0.0555 (7) | |
H3A | 1.4313 | 0.8839 | 0.2833 | 0.067* | |
C4 | 1.2989 (4) | 0.7039 (5) | 0.31349 (9) | 0.0619 (8) | |
H4A | 1.3206 | 0.7472 | 0.3368 | 0.074* | |
C5 | 1.2078 (3) | 0.5430 (4) | 0.25829 (7) | 0.0426 (5) | |
C6 | 1.1309 (4) | 0.4206 (4) | 0.22997 (8) | 0.0515 (7) | |
H6A | 1.0054 | 0.3804 | 0.2365 | 0.062* | |
H6B | 1.2134 | 0.3195 | 0.2281 | 0.062* | |
C7 | 1.1199 (4) | 0.5162 (4) | 0.19417 (8) | 0.0453 (6) | |
H7A | 1.0920 | 0.4343 | 0.1747 | 0.054* | |
H7B | 1.0190 | 0.6026 | 0.1945 | 0.054* | |
C8 | 1.2147 (3) | 0.7874 (3) | 0.12720 (7) | 0.0367 (5) | |
C9 | 1.2684 (4) | 0.9644 (3) | 0.13041 (8) | 0.0443 (6) | |
H9A | 1.3834 | 1.0013 | 0.1407 | 0.053* | |
C10 | 1.1341 (4) | 1.0751 (3) | 0.11683 (8) | 0.0486 (6) | |
H10A | 1.1467 | 1.1961 | 0.1166 | 0.058* | |
C11 | 1.0374 (3) | 0.7667 (3) | 0.11097 (6) | 0.0366 (5) | |
C12 | 0.9260 (3) | 0.6133 (3) | 0.10159 (6) | 0.0359 (5) | |
C13 | 0.7017 (3) | 0.4705 (3) | 0.07619 (7) | 0.0367 (5) | |
C14 | 0.5288 (3) | 0.4345 (3) | 0.05505 (6) | 0.0374 (5) | |
C15 | 0.4063 (4) | 0.5660 (4) | 0.04346 (8) | 0.0492 (6) | |
H15A | 0.4393 | 0.6814 | 0.0484 | 0.059* | |
C16 | 0.1984 (4) | 0.3691 (4) | 0.01865 (8) | 0.0541 (7) | |
H16A | 0.0842 | 0.3453 | 0.0064 | 0.065* | |
C17 | 0.3143 (3) | 0.2309 (4) | 0.02888 (7) | 0.0442 (6) | |
C18 | 0.4814 (3) | 0.2626 (3) | 0.04777 (7) | 0.0415 (5) | |
H18A | 0.5600 | 0.1713 | 0.0554 | 0.050* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0598 (4) | 0.0272 (3) | 0.0493 (4) | 0.0054 (2) | −0.0094 (3) | 0.0027 (3) |
S2 | 0.0358 (3) | 0.0367 (3) | 0.0390 (3) | 0.0038 (2) | 0.0026 (2) | −0.0008 (2) |
S3 | 0.0600 (4) | 0.0788 (5) | 0.0392 (4) | 0.0036 (4) | 0.0025 (3) | 0.0054 (4) |
Br1 | 0.04669 (17) | 0.0620 (2) | 0.0854 (3) | −0.00962 (13) | −0.01522 (15) | −0.01519 (17) |
O1 | 0.0451 (9) | 0.0303 (7) | 0.0356 (9) | 0.0030 (6) | −0.0073 (7) | 0.0014 (7) |
O2 | 0.0351 (9) | 0.0595 (12) | 0.0571 (12) | −0.0017 (8) | 0.0089 (8) | 0.0006 (9) |
O3 | 0.0534 (11) | 0.0408 (9) | 0.0449 (11) | 0.0115 (8) | 0.0011 (8) | −0.0084 (8) |
N1 | 0.0554 (13) | 0.0304 (10) | 0.0638 (15) | −0.0004 (9) | −0.0274 (11) | 0.0006 (10) |
N2 | 0.0576 (13) | 0.0280 (9) | 0.0671 (16) | −0.0017 (9) | −0.0277 (12) | −0.0001 (10) |
N3 | 0.0317 (9) | 0.0376 (10) | 0.0379 (11) | −0.0042 (7) | −0.0015 (8) | −0.0015 (8) |
N4 | 0.0522 (14) | 0.0607 (15) | 0.0610 (16) | 0.0138 (11) | −0.0163 (12) | 0.0063 (12) |
C1 | 0.0475 (14) | 0.0396 (12) | 0.0459 (15) | −0.0084 (10) | 0.0007 (11) | −0.0064 (11) |
C2 | 0.0303 (11) | 0.0482 (13) | 0.0404 (14) | 0.0004 (9) | −0.0031 (10) | −0.0065 (11) |
C3 | 0.0443 (14) | 0.0685 (19) | 0.0534 (18) | −0.0038 (13) | −0.0043 (13) | −0.0197 (15) |
C4 | 0.0549 (16) | 0.087 (2) | 0.0439 (17) | 0.0084 (15) | −0.0062 (13) | −0.0193 (16) |
C5 | 0.0370 (12) | 0.0512 (14) | 0.0395 (14) | 0.0016 (10) | −0.0015 (10) | 0.0004 (11) |
C6 | 0.0537 (15) | 0.0537 (15) | 0.0471 (16) | −0.0187 (12) | 0.0028 (12) | 0.0018 (13) |
C7 | 0.0367 (12) | 0.0570 (16) | 0.0420 (14) | −0.0119 (11) | −0.0036 (10) | −0.0012 (12) |
C8 | 0.0431 (12) | 0.0300 (10) | 0.0369 (13) | 0.0003 (9) | 0.0010 (10) | 0.0013 (9) |
C9 | 0.0537 (15) | 0.0346 (11) | 0.0445 (15) | −0.0070 (10) | −0.0015 (12) | −0.0003 (11) |
C10 | 0.0658 (17) | 0.0285 (11) | 0.0512 (16) | −0.0034 (11) | −0.0048 (13) | 0.0019 (11) |
C11 | 0.0484 (13) | 0.0253 (9) | 0.0358 (13) | 0.0025 (9) | −0.0029 (10) | 0.0002 (9) |
C12 | 0.0454 (12) | 0.0281 (10) | 0.0338 (12) | 0.0029 (9) | −0.0075 (10) | −0.0024 (9) |
C13 | 0.0427 (12) | 0.0313 (10) | 0.0357 (12) | 0.0030 (9) | −0.0055 (10) | −0.0023 (9) |
C14 | 0.0410 (12) | 0.0401 (12) | 0.0308 (12) | 0.0033 (10) | −0.0042 (9) | 0.0000 (10) |
C15 | 0.0543 (15) | 0.0456 (14) | 0.0475 (16) | 0.0079 (12) | −0.0071 (12) | 0.0021 (12) |
C16 | 0.0401 (13) | 0.0674 (19) | 0.0542 (17) | 0.0042 (13) | −0.0107 (12) | 0.0033 (15) |
C17 | 0.0385 (12) | 0.0524 (14) | 0.0415 (14) | 0.0002 (11) | −0.0056 (11) | −0.0016 (12) |
C18 | 0.0373 (12) | 0.0436 (12) | 0.0432 (14) | 0.0049 (10) | −0.0076 (10) | −0.0003 (11) |
S1—C10 | 1.698 (3) | C3—C4 | 1.345 (4) |
S1—C11 | 1.720 (2) | C3—H3A | 0.9300 |
S2—O3 | 1.4233 (19) | C4—H4A | 0.9300 |
S2—O2 | 1.4248 (18) | C5—C6 | 1.496 (4) |
S2—N3 | 1.625 (2) | C6—C7 | 1.512 (4) |
S2—C8 | 1.774 (2) | C6—H6A | 0.9700 |
S3—C4 | 1.707 (4) | C6—H6B | 0.9700 |
S3—C5 | 1.718 (3) | C7—H7A | 0.9700 |
Br1—C17 | 1.884 (3) | C7—H7B | 0.9700 |
O1—C13 | 1.353 (3) | C8—C11 | 1.381 (3) |
O1—C12 | 1.362 (3) | C8—C9 | 1.410 (3) |
N1—C13 | 1.284 (3) | C9—C10 | 1.356 (4) |
N1—N2 | 1.394 (3) | C9—H9A | 0.9300 |
N2—C12 | 1.291 (3) | C10—H10A | 0.9300 |
N3—C1 | 1.473 (3) | C11—C12 | 1.448 (3) |
N3—C7 | 1.479 (3) | C13—C14 | 1.456 (3) |
N4—C15 | 1.329 (4) | C14—C18 | 1.381 (3) |
N4—C16 | 1.329 (4) | C14—C15 | 1.386 (4) |
C1—C2 | 1.501 (4) | C15—H15A | 0.9300 |
C1—H1A | 0.9700 | C16—C17 | 1.382 (4) |
C1—H1B | 0.9700 | C16—H16A | 0.9300 |
C2—C5 | 1.349 (4) | C17—C18 | 1.375 (3) |
C2—C3 | 1.417 (4) | C18—H18A | 0.9300 |
C10—S1—C11 | 92.19 (12) | N3—C7—C6 | 108.8 (2) |
O3—S2—O2 | 119.45 (11) | N3—C7—H7A | 109.9 |
O3—S2—N3 | 107.45 (11) | C6—C7—H7A | 109.9 |
O2—S2—N3 | 106.69 (11) | N3—C7—H7B | 109.9 |
O3—S2—C8 | 110.45 (11) | C6—C7—H7B | 109.9 |
O2—S2—C8 | 105.95 (11) | H7A—C7—H7B | 108.3 |
N3—S2—C8 | 106.06 (11) | C11—C8—C9 | 112.6 (2) |
C4—S3—C5 | 91.51 (15) | C11—C8—S2 | 129.09 (17) |
C13—O1—C12 | 102.63 (17) | C9—C8—S2 | 118.17 (19) |
C13—N1—N2 | 106.4 (2) | C10—C9—C8 | 112.7 (2) |
C12—N2—N1 | 106.31 (19) | C10—C9—H9A | 123.7 |
C1—N3—C7 | 114.6 (2) | C8—C9—H9A | 123.7 |
C1—N3—S2 | 117.19 (16) | C9—C10—S1 | 112.13 (19) |
C7—N3—S2 | 117.26 (16) | C9—C10—H10A | 123.9 |
C15—N4—C16 | 117.9 (2) | S1—C10—H10A | 123.9 |
N3—C1—C2 | 109.1 (2) | C8—C11—C12 | 132.5 (2) |
N3—C1—H1A | 109.9 | C8—C11—S1 | 110.41 (17) |
C2—C1—H1A | 109.9 | C12—C11—S1 | 117.10 (17) |
N3—C1—H1B | 109.9 | N2—C12—O1 | 112.0 (2) |
C2—C1—H1B | 109.9 | N2—C12—C11 | 130.1 (2) |
H1A—C1—H1B | 108.3 | O1—C12—C11 | 117.87 (19) |
C5—C2—C3 | 112.2 (3) | N1—C13—O1 | 112.6 (2) |
C5—C2—C1 | 122.4 (2) | N1—C13—C14 | 126.3 (2) |
C3—C2—C1 | 125.3 (2) | O1—C13—C14 | 121.0 (2) |
C4—C3—C2 | 113.0 (3) | C18—C14—C15 | 119.0 (2) |
C4—C3—H3A | 123.5 | C18—C14—C13 | 118.6 (2) |
C2—C3—H3A | 123.5 | C15—C14—C13 | 122.3 (2) |
C3—C4—S3 | 111.7 (2) | N4—C15—C14 | 123.0 (3) |
C3—C4—H4A | 124.2 | N4—C15—H15A | 118.5 |
S3—C4—H4A | 124.2 | C14—C15—H15A | 118.5 |
C2—C5—C6 | 124.5 (2) | N4—C16—C17 | 122.6 (3) |
C2—C5—S3 | 111.6 (2) | N4—C16—H16A | 118.7 |
C6—C5—S3 | 124.0 (2) | C17—C16—H16A | 118.7 |
C5—C6—C7 | 108.6 (2) | C18—C17—C16 | 119.7 (3) |
C5—C6—H6A | 110.0 | C18—C17—Br1 | 119.8 (2) |
C7—C6—H6A | 110.0 | C16—C17—Br1 | 120.4 (2) |
C5—C6—H6B | 110.0 | C17—C18—C14 | 117.8 (2) |
C7—C6—H6B | 110.0 | C17—C18—H18A | 121.1 |
H6A—C6—H6B | 108.3 | C14—C18—H18A | 121.1 |
C13—N1—N2—C12 | −0.5 (3) | C8—C9—C10—S1 | 0.5 (3) |
O3—S2—N3—C1 | 170.10 (17) | C11—S1—C10—C9 | −0.6 (2) |
O2—S2—N3—C1 | 40.9 (2) | C9—C8—C11—C12 | 179.0 (3) |
C8—S2—N3—C1 | −71.75 (19) | S2—C8—C11—C12 | −5.7 (4) |
O3—S2—N3—C7 | −47.6 (2) | C9—C8—C11—S1 | −0.3 (3) |
O2—S2—N3—C7 | −176.79 (18) | S2—C8—C11—S1 | 174.96 (15) |
C8—S2—N3—C7 | 70.6 (2) | C10—S1—C11—C8 | 0.5 (2) |
C7—N3—C1—C2 | 45.9 (3) | C10—S1—C11—C12 | −178.9 (2) |
S2—N3—C1—C2 | −170.77 (16) | N1—N2—C12—O1 | 0.1 (3) |
N3—C1—C2—C5 | −13.3 (3) | N1—N2—C12—C11 | 179.3 (3) |
N3—C1—C2—C3 | 170.1 (2) | C13—O1—C12—N2 | 0.3 (3) |
C5—C2—C3—C4 | 0.0 (4) | C13—O1—C12—C11 | −179.0 (2) |
C1—C2—C3—C4 | 176.9 (3) | C8—C11—C12—N2 | 15.1 (5) |
C2—C3—C4—S3 | 0.0 (3) | S1—C11—C12—N2 | −165.6 (2) |
C5—S3—C4—C3 | 0.0 (2) | C8—C11—C12—O1 | −165.8 (2) |
C3—C2—C5—C6 | 179.2 (3) | S1—C11—C12—O1 | 13.5 (3) |
C1—C2—C5—C6 | 2.2 (4) | N2—N1—C13—O1 | 0.7 (3) |
C3—C2—C5—S3 | 0.0 (3) | N2—N1—C13—C14 | −177.0 (2) |
C1—C2—C5—S3 | −177.00 (19) | C12—O1—C13—N1 | −0.6 (3) |
C4—S3—C5—C2 | 0.0 (2) | C12—O1—C13—C14 | 177.3 (2) |
C4—S3—C5—C6 | −179.2 (2) | N1—C13—C14—C18 | −14.6 (4) |
C2—C5—C6—C7 | −20.7 (4) | O1—C13—C14—C18 | 167.9 (2) |
S3—C5—C6—C7 | 158.4 (2) | N1—C13—C14—C15 | 162.4 (3) |
C1—N3—C7—C6 | −67.1 (3) | O1—C13—C14—C15 | −15.1 (4) |
S2—N3—C7—C6 | 149.6 (2) | C16—N4—C15—C14 | −0.2 (4) |
C5—C6—C7—N3 | 49.6 (3) | C18—C14—C15—N4 | 0.2 (4) |
O3—S2—C8—C11 | 29.5 (3) | C13—C14—C15—N4 | −176.8 (3) |
O2—S2—C8—C11 | 160.2 (2) | C15—N4—C16—C17 | −0.7 (5) |
N3—S2—C8—C11 | −86.6 (2) | N4—C16—C17—C18 | 1.6 (4) |
O3—S2—C8—C9 | −155.4 (2) | N4—C16—C17—Br1 | −178.6 (2) |
O2—S2—C8—C9 | −24.7 (2) | C16—C17—C18—C14 | −1.5 (4) |
N3—S2—C8—C9 | 88.4 (2) | Br1—C17—C18—C14 | 178.66 (19) |
C11—C8—C9—C10 | −0.1 (3) | C15—C14—C18—C17 | 0.7 (4) |
S2—C8—C9—C10 | −175.9 (2) | C13—C14—C18—C17 | 177.8 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
C7—H7A···N2 | 0.97 | 2.52 | 3.283 (4) | 136 |
C10—H10A···O3i | 0.93 | 2.49 | 3.330 (3) | 150 |
C10—H10A···N2i | 0.93 | 2.42 | 3.183 (3) | 139 |
Symmetry code: (i) x, y+1, z. |
Experimental details
Crystal data | |
Chemical formula | C18H13BrN4O3S3 |
Mr | 509.41 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 296 |
a, b, c (Å) | 7.0327 (14), 7.6488 (15), 36.939 (7) |
β (°) | 91.315 (5) |
V (Å3) | 1986.5 (7) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 2.41 |
Crystal size (mm) | 0.35 × 0.13 × 0.05 |
Data collection | |
Diffractometer | Bruker APEXII DUO CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2009) |
Tmin, Tmax | 0.482, 0.885 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 22958, 7230, 4160 |
Rint | 0.051 |
(sin θ/λ)max (Å−1) | 0.760 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.046, 0.123, 1.02 |
No. of reflections | 7230 |
No. of parameters | 262 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.76, −0.73 |
Computer programs: APEX2 (Bruker, 2009), SAINT (Bruker, 2009), SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
C7—H7A···N2 | 0.97 | 2.52 | 3.283 (4) | 136 |
C10—H10A···O3i | 0.93 | 2.49 | 3.330 (3) | 150 |
C10—H10A···N2i | 0.93 | 2.42 | 3.183 (3) | 139 |
Symmetry code: (i) x, y+1, z. |
Footnotes
‡Thomson Reuters ResearcherID: A-3561-2009.
Acknowledgements
HKF and MH thank the Malaysian Government and Universiti Sains Malaysia for the Research University Grant No. 1001/PFIZIK/811160. MH also thanks Universiti Sains Malaysia for a post-doctoral research fellowship. AMI thanks the Department of Atomic Energy, Board for Research in Nuclear Sciences, Government of India, for the Young Scientist award.
References
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4,5,6,7-Tetrahydrothieno[3,2-c]pyridine derivatives are extensively studied in medicinal chemistry due to their various biological activities (Lopez-Rodriguez et al., 2001). 4,5,6,7-Tetrahydrothieno[3,2-c] pyridine oxadiazole derivatives are mainly used in CNS functions and disorders such as schizophrenia (Roth et al., 1994), depression, epilepsy, migraine, and control of circadian rhythm (Ying & Rusak, 1997).
The molecular structure of the title compound, Fig. 1, contains five rings, namely, A (N3/C1,C2,C5–C7), B (N1/N2/O1/C12,C13), C (S3/C2–C5), D (S1/C8–C11) and E (N4/C14–C18). The tetrahydropyridine (N3/C1,C2,C5–C7) ring adopts a half-chair conformation with puckering parameters Q = 0.497 (3) Å, θ = 131.5 (3)° and φ = 141.6 (4)° with the flap atom at C7 [maximum deviation of -0.338 (3) Å]. The dihedral angle between the least-squares planes of the rings are A/B = 54.76 (13)°, A/C = 5.66 (13)°, A/D = 68.63 (13)°, A/E = 69.34 (13)°, B/C = 56.97 (14)°, B/D = 13.90 (14)°, B/E = 15.62 (13)°, C/D = 70.85 (13)°, and C/E = 70.88 (13)°.
In the crystal structure, (Fig. 2), adjacent molecules are connected via bifurcated C—H···N and C—H···O (Table 1) hydrogen bonds forming one-dimensional chains along the b-axis.