organic compounds
Ethyl 4-hydroxy-2,6-diphenyl-1-(2-thiomorpholinoacetyl)-1,2,5,6-tetrahydropyridine-3-carboxylate
aDepartment of Image Science and Engineering, Pukyong National University, Busan 608-739, Republic of Korea, and bCentre of Advanced Study in Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai 600 025, India
*Correspondence e-mail: ytjeong@pknu.ac.kr
In the title compound, C26H30N2O4S, the thiomorpholine ring adopts a chair conformation whereas the tetrahydropyridine ring is in a half-chair conformation. The dihedral angle between the two phenyl rings is 33.3 (2)°. A strong intramolecular O—H⋯O hydrogen bond generates an S(6) motif. In the crystal, molecules are linked by intermolecular C—H⋯O hydrogen bonds, generating a ribbon-like structure propagating along the a axis.
Related literature
For general background to the biological activity of tetrahydropyridine derivatives, see: Aridoss et al. (2008, 2010); Chow et al. (1968). For related structures, see: Subha Nandhini et al. (2003); Aridoss et al. (2009); Parkin et al. (2004). For ring see: Cremer & Pople (1975); Nardelli (1983).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2008); cell SAINT (Bruker, 2008); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: SHELXL97 and PLATON (Spek, 2009).
Supporting information
https://doi.org/10.1107/S1600536810026413/ci5116sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810026413/ci5116Isup2.hkl
To a mixture of thiomorpholine (1 equiv.) and dry K2CO3 (2 equiv.) in benzene, N-chloroacetyl-3-carboxyethyl-2,6-diphenylpiperidin-4-one (1 equiv.) in benzene was added slowly and refluxed until completion (Aridoss et al., 2010). Through a typical work up procedure and purification, pure title compound was achieved, which on further crystallization in ethanol gave diffraction quality crystals.
H atoms were positioned geometrically (O–H = 0.82 Å and C–H = 0.93–0.98 Å) and allowed to ride on their parent atoms, with Uiso(H) = 1.5Ueq(C) for methyl H and 1.2 Ueq(C) for other H atoms.
The
of N-chloroacetyl-3-carboxyethyl-2,6-diphenyl-4-hydroxy-Δ3-tetrahydropyridine obtained from the chloroacetylation of 3-carboxyethyl-2,6-diphenylpiperidin-4-one contains two crystallographically independent molecules wherein the two phenyl groups are oriented axially to avoid the steric repulsion (A1,3 strain; Chow et al., 1968) with coplanar –NCOCH2 group besides adopting the non-chair conformation for the tetrahydropyridine ring (Aridoss et al., 2008). However, it was confirmed by X-ray study that the two phenyl groups take up anti orientation with each other upon replacement of chlorine by morpholine system (Aridoss et al., 2010). In order to study the orientation of phenyl groups and conformation of tetrahydropyridine ring system upon substitution of thiomorpholine instead of morpholine, the current study has been undertaken.The sum of bond angles around atoms N1 (358.0 (2)°) and N2 (329.5 (2)°) of the tetrahydropyridine and the thiomorpholine rings in the molecule is in accordance with sp2 and sp3 hybridizations. The thiomorpholine ring adopts a chair conformation. The tetrahydropyridine ring adopts a half-chair conformation. The puckering parameters (Cremer & Pople, 1975) and the smallest displacement asymmetry parameters (Nardelli, 1983) for the thiomorpholine/tetrahydropyridine ring are q2 = 0.021 (3)/0.355 (2) Å, q3 = 0.631 (3)/-0.295 (2) Å; QT = 0.632 (3)/0.461 (2) Å and θ = 1.8 (3)/129.8 (3)°. The dihedral angle between the two phenyl ring is 33.4 (2)°. The thiomorpholine and tetrahydropyridine rings are connected by the ethanone. The ethyl acetate group shows an extended conformation [C18—O3—C19—C20 = 110.8 (6)°]. The molecular structure is stabilized by a strong O—H···O hydrogen bond, wherein, atom O1 acts as a donor to O2, generating an S(6) motif.
Atoms C2 and C10 act as donors to form hydrogen bonds with atom O4 as an aceptor. In the
the molecules at (x,y,z) and (1 - x,1 - y,-z), (2 - x,1 - y,-z) are linked by C—H···O hydrogen bonds into a ribbon-like structure along the a axis; the ribbons contain R22(12) and R22(16) ring motifs.For general background to and the and biological activity of tetrahydropyridine derivatives, see: Aridoss et al. (2008, 2010); Chow et al. (1968). For related structures, see: Subha Nandhini et al. (2003); Aridoss et al. (2009); Parkin et al. (2004). For ring
see: Cremer & Pople (1975); Nardelli (1983).Data collection: APEX2 (Bruker, 2008); cell
SAINT (Bruker, 2008); data reduction: SAINT (Bruker, 2008); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009).C26H30N2O4S | F(000) = 992 |
Mr = 466.58 | Dx = 1.294 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 1201 reflections |
a = 10.9561 (6) Å | θ = 1.8–28.2° |
b = 9.5665 (6) Å | µ = 0.17 mm−1 |
c = 22.9011 (12) Å | T = 292 K |
β = 93.575 (3)° | Block, colourless |
V = 2395.6 (2) Å3 | 0.26 × 0.23 × 0.20 mm |
Z = 4 |
Bruker SMART APEXII area-detector diffractometer | 5677 independent reflections |
Radiation source: fine-focus sealed tube | 3669 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.029 |
ω and φ scans | θmax = 28.2°, θmin = 1.8° |
Absorption correction: multi-scan (SADABS; Bruker, 2008) | h = −14→14 |
Tmin = 0.957, Tmax = 0.967 | k = −11→12 |
21473 measured reflections | l = −29→29 |
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)] = 0.065 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.217 | H-atom parameters constrained |
S = 1.04 | w = 1/[σ2(Fo2) + (0.1095P)2 + 1.0086P] where P = (Fo2 + 2Fc2)/3 |
5677 reflections | (Δ/σ)max = 0.001 |
299 parameters | Δρmax = 0.75 e Å−3 |
1 restraint | Δρmin = −0.56 e Å−3 |
C26H30N2O4S | V = 2395.6 (2) Å3 |
Mr = 466.58 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 10.9561 (6) Å | µ = 0.17 mm−1 |
b = 9.5665 (6) Å | T = 292 K |
c = 22.9011 (12) Å | 0.26 × 0.23 × 0.20 mm |
β = 93.575 (3)° |
Bruker SMART APEXII area-detector diffractometer | 5677 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2008) | 3669 reflections with I > 2σ(I) |
Tmin = 0.957, Tmax = 0.967 | Rint = 0.029 |
21473 measured reflections |
R[F2 > 2σ(F2)] = 0.065 | 1 restraint |
wR(F2) = 0.217 | H-atom parameters constrained |
S = 1.04 | Δρmax = 0.75 e Å−3 |
5677 reflections | Δρmin = −0.56 e Å−3 |
299 parameters |
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 | ||
C1 | 0.4059 (2) | 0.1850 (2) | −0.01465 (10) | 0.0453 (5) | |
H1 | 0.4343 | 0.1666 | 0.0260 | 0.054* | |
C2 | 0.5190 (2) | 0.2068 (3) | −0.04884 (11) | 0.0513 (6) | |
H2A | 0.5772 | 0.2644 | −0.0260 | 0.062* | |
H2B | 0.5573 | 0.1171 | −0.0552 | 0.062* | |
C3 | 0.4893 (2) | 0.2748 (3) | −0.10615 (10) | 0.0490 (6) | |
C4 | 0.3873 (2) | 0.3516 (3) | −0.11724 (10) | 0.0478 (6) | |
C5 | 0.2932 (2) | 0.3731 (2) | −0.07271 (10) | 0.0444 (5) | |
H5 | 0.2859 | 0.4745 | −0.0678 | 0.053* | |
C6 | 0.1649 (2) | 0.3208 (3) | −0.09247 (10) | 0.0459 (5) | |
C7 | 0.1448 (2) | 0.2216 (3) | −0.13558 (11) | 0.0532 (6) | |
H7 | 0.2113 | 0.1804 | −0.1522 | 0.064* | |
C8 | 0.0270 (3) | 0.1820 (4) | −0.15461 (14) | 0.0680 (8) | |
H8 | 0.0150 | 0.1150 | −0.1838 | 0.082* | |
C9 | −0.0707 (3) | 0.2415 (4) | −0.13036 (17) | 0.0796 (10) | |
H9 | −0.1497 | 0.2155 | −0.1432 | 0.095* | |
C10 | −0.0529 (3) | 0.3394 (4) | −0.08723 (18) | 0.0805 (10) | |
H10 | −0.1198 | 0.3792 | −0.0705 | 0.097* | |
C11 | 0.0651 (3) | 0.3799 (3) | −0.06812 (14) | 0.0634 (7) | |
H11 | 0.0766 | 0.4470 | −0.0389 | 0.076* | |
C12 | 0.3253 (2) | 0.0626 (2) | −0.03482 (10) | 0.0440 (5) | |
C13 | 0.3550 (2) | −0.0269 (3) | −0.07933 (11) | 0.0544 (6) | |
H13 | 0.4231 | −0.0085 | −0.1004 | 0.065* | |
C14 | 0.2841 (3) | −0.1436 (3) | −0.09264 (15) | 0.0699 (8) | |
H14 | 0.3051 | −0.2032 | −0.1225 | 0.084* | |
C15 | 0.1833 (3) | −0.1722 (3) | −0.06235 (16) | 0.0722 (9) | |
H15 | 0.1365 | −0.2514 | −0.0713 | 0.087* | |
C16 | 0.1517 (3) | −0.0838 (3) | −0.01875 (15) | 0.0698 (8) | |
H16 | 0.0827 | −0.1023 | 0.0017 | 0.084* | |
C17 | 0.2222 (2) | 0.0330 (3) | −0.00502 (12) | 0.0563 (6) | |
H17 | 0.2000 | 0.0926 | 0.0246 | 0.068* | |
C18 | 0.3700 (2) | 0.4250 (3) | −0.17259 (12) | 0.0608 (7) | |
C19 | 0.2455 (3) | 0.5885 (5) | −0.22699 (16) | 0.0963 (13) | |
H19A | 0.3047 | 0.5682 | −0.2556 | 0.116* | |
H19B | 0.2436 | 0.6888 | −0.2209 | 0.116* | |
C20 | 0.1253 (5) | 0.5390 (10) | −0.2479 (3) | 0.210 (4) | |
H20A | 0.1195 | 0.4404 | −0.2409 | 0.315* | |
H20B | 0.1132 | 0.5568 | −0.2891 | 0.315* | |
H20C | 0.0638 | 0.5871 | −0.2276 | 0.315* | |
C21 | 0.3374 (2) | 0.4067 (3) | 0.03114 (11) | 0.0508 (6) | |
C22 | 0.3935 (3) | 0.3617 (3) | 0.09078 (11) | 0.0566 (6) | |
H22A | 0.4770 | 0.3320 | 0.0863 | 0.068* | |
H22B | 0.3963 | 0.4421 | 0.1167 | 0.068* | |
C23 | 0.2018 (3) | 0.2891 (4) | 0.12692 (14) | 0.0677 (8) | |
H23A | 0.1630 | 0.3190 | 0.0898 | 0.081* | |
H23B | 0.2017 | 0.3677 | 0.1536 | 0.081* | |
C24 | 0.1283 (3) | 0.1705 (5) | 0.15118 (15) | 0.0811 (10) | |
H24A | 0.1292 | 0.0915 | 0.1246 | 0.097* | |
H24B | 0.0440 | 0.2003 | 0.1531 | 0.097* | |
C25 | 0.3410 (3) | 0.0918 (5) | 0.20431 (15) | 0.0880 (11) | |
H25A | 0.3909 | 0.0721 | 0.2398 | 0.106* | |
H25B | 0.3453 | 0.0113 | 0.1788 | 0.106* | |
C26 | 0.3931 (3) | 0.2171 (4) | 0.17450 (11) | 0.0661 (8) | |
H26A | 0.3891 | 0.2977 | 0.2000 | 0.079* | |
H26B | 0.4785 | 0.1996 | 0.1682 | 0.079* | |
N1 | 0.33686 (18) | 0.3177 (2) | −0.01508 (8) | 0.0449 (5) | |
N2 | 0.32827 (18) | 0.2491 (2) | 0.11832 (8) | 0.0508 (5) | |
O1 | 0.57597 (16) | 0.2550 (2) | −0.14448 (8) | 0.0655 (5) | |
H1A | 0.5564 | 0.2960 | −0.1751 | 0.098* | |
O2 | 0.4311 (2) | 0.4081 (3) | −0.21421 (9) | 0.0931 (8) | |
O3 | 0.27914 (19) | 0.5182 (2) | −0.17266 (9) | 0.0733 (6) | |
O4 | 0.2948 (2) | 0.5239 (2) | 0.02621 (9) | 0.0703 (6) | |
S1 | 0.18591 (8) | 0.11578 (13) | 0.22245 (4) | 0.0894 (4) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0494 (13) | 0.0440 (13) | 0.0416 (11) | 0.0044 (10) | −0.0030 (9) | 0.0038 (10) |
C2 | 0.0460 (13) | 0.0507 (14) | 0.0563 (14) | 0.0030 (11) | −0.0027 (11) | 0.0048 (11) |
C3 | 0.0409 (12) | 0.0581 (15) | 0.0481 (12) | −0.0064 (11) | 0.0041 (10) | −0.0007 (11) |
C4 | 0.0444 (12) | 0.0556 (14) | 0.0431 (12) | −0.0040 (11) | 0.0004 (9) | 0.0086 (11) |
C5 | 0.0494 (13) | 0.0414 (12) | 0.0422 (11) | 0.0047 (10) | 0.0009 (9) | 0.0064 (10) |
C6 | 0.0476 (13) | 0.0462 (13) | 0.0440 (11) | 0.0069 (10) | 0.0036 (10) | 0.0127 (10) |
C7 | 0.0455 (13) | 0.0633 (16) | 0.0511 (13) | 0.0012 (11) | 0.0045 (10) | 0.0004 (12) |
C8 | 0.0566 (16) | 0.079 (2) | 0.0674 (17) | −0.0105 (15) | −0.0065 (13) | 0.0080 (15) |
C9 | 0.0430 (15) | 0.096 (3) | 0.098 (2) | −0.0052 (16) | −0.0040 (15) | 0.027 (2) |
C10 | 0.0493 (17) | 0.090 (2) | 0.104 (3) | 0.0202 (16) | 0.0206 (17) | 0.014 (2) |
C11 | 0.0561 (16) | 0.0626 (17) | 0.0726 (18) | 0.0134 (13) | 0.0131 (13) | 0.0026 (14) |
C12 | 0.0491 (13) | 0.0402 (12) | 0.0422 (11) | 0.0059 (10) | −0.0014 (9) | 0.0066 (10) |
C13 | 0.0545 (14) | 0.0551 (15) | 0.0537 (13) | 0.0040 (12) | 0.0035 (11) | −0.0063 (12) |
C14 | 0.0706 (19) | 0.0600 (17) | 0.0775 (19) | 0.0073 (15) | −0.0081 (15) | −0.0180 (15) |
C15 | 0.0669 (19) | 0.0492 (16) | 0.098 (2) | −0.0057 (14) | −0.0158 (17) | −0.0008 (16) |
C16 | 0.0587 (17) | 0.0653 (18) | 0.086 (2) | −0.0083 (14) | 0.0083 (15) | 0.0139 (17) |
C17 | 0.0602 (16) | 0.0533 (15) | 0.0562 (14) | 0.0028 (12) | 0.0096 (12) | 0.0024 (12) |
C18 | 0.0461 (14) | 0.083 (2) | 0.0528 (14) | −0.0113 (14) | −0.0002 (11) | 0.0193 (14) |
C19 | 0.090 (2) | 0.122 (3) | 0.074 (2) | −0.001 (2) | −0.0136 (18) | 0.054 (2) |
C20 | 0.161 (6) | 0.285 (9) | 0.170 (6) | −0.070 (6) | −0.097 (5) | 0.132 (6) |
C21 | 0.0545 (14) | 0.0468 (14) | 0.0512 (13) | −0.0051 (11) | 0.0032 (11) | −0.0029 (11) |
C22 | 0.0628 (16) | 0.0607 (16) | 0.0457 (13) | −0.0097 (13) | −0.0010 (11) | −0.0088 (12) |
C23 | 0.0533 (15) | 0.085 (2) | 0.0649 (17) | 0.0086 (15) | 0.0013 (13) | −0.0027 (15) |
C24 | 0.0572 (17) | 0.115 (3) | 0.0716 (19) | −0.0078 (18) | 0.0067 (14) | 0.003 (2) |
C25 | 0.075 (2) | 0.125 (3) | 0.0650 (18) | 0.014 (2) | 0.0171 (16) | 0.027 (2) |
C26 | 0.0517 (15) | 0.100 (2) | 0.0464 (13) | 0.0049 (15) | 0.0036 (11) | 0.0035 (14) |
N1 | 0.0541 (11) | 0.0394 (10) | 0.0407 (9) | 0.0032 (8) | −0.0006 (8) | 0.0025 (8) |
N2 | 0.0490 (11) | 0.0620 (13) | 0.0415 (10) | −0.0003 (10) | 0.0031 (8) | −0.0024 (9) |
O1 | 0.0481 (10) | 0.0906 (15) | 0.0588 (11) | 0.0004 (10) | 0.0102 (8) | 0.0043 (10) |
O2 | 0.0701 (14) | 0.153 (2) | 0.0575 (12) | 0.0105 (15) | 0.0187 (10) | 0.0351 (14) |
O3 | 0.0670 (12) | 0.0914 (15) | 0.0606 (11) | 0.0040 (11) | −0.0022 (9) | 0.0363 (11) |
O4 | 0.0921 (15) | 0.0517 (12) | 0.0667 (12) | 0.0117 (10) | 0.0025 (11) | −0.0090 (9) |
S1 | 0.0735 (6) | 0.1382 (9) | 0.0589 (5) | −0.0044 (5) | 0.0220 (4) | 0.0086 (5) |
C1—N1 | 1.477 (3) | C16—C17 | 1.383 (4) |
C1—C2 | 1.521 (3) | C16—H16 | 0.93 |
C1—C12 | 1.521 (3) | C17—H17 | 0.93 |
C1—H1 | 0.98 | C18—O2 | 1.209 (3) |
C2—C3 | 1.483 (3) | C18—O3 | 1.336 (4) |
C2—H2A | 0.97 | C19—O3 | 1.442 (3) |
C2—H2B | 0.97 | C19—C20 | 1.452 (4) |
C3—O1 | 1.346 (3) | C19—H19A | 0.97 |
C3—C4 | 1.348 (3) | C19—H19B | 0.97 |
C4—C18 | 1.451 (3) | C20—H20A | 0.96 |
C4—C5 | 1.508 (3) | C20—H20B | 0.96 |
C5—N1 | 1.474 (3) | C20—H20C | 0.96 |
C5—C6 | 1.533 (3) | C21—O4 | 1.217 (3) |
C5—H5 | 0.98 | C21—N1 | 1.359 (3) |
C6—C7 | 1.377 (4) | C21—C22 | 1.524 (4) |
C6—C11 | 1.379 (4) | C22—N2 | 1.458 (3) |
C7—C8 | 1.389 (4) | C22—H22A | 0.97 |
C7—H7 | 0.93 | C22—H22B | 0.97 |
C8—C9 | 1.362 (5) | C23—N2 | 1.462 (3) |
C8—H8 | 0.93 | C23—C24 | 1.517 (5) |
C9—C10 | 1.366 (5) | C23—H23A | 0.97 |
C9—H9 | 0.93 | C23—H23B | 0.97 |
C10—C11 | 1.394 (5) | C24—S1 | 1.791 (4) |
C10—H10 | 0.93 | C24—H24A | 0.97 |
C11—H11 | 0.93 | C24—H24B | 0.97 |
C12—C13 | 1.385 (3) | C25—C26 | 1.509 (5) |
C12—C17 | 1.385 (4) | C25—S1 | 1.789 (3) |
C13—C14 | 1.383 (4) | C25—H25A | 0.97 |
C13—H13 | 0.93 | C25—H25B | 0.97 |
C14—C15 | 1.368 (5) | C26—N2 | 1.463 (3) |
C14—H14 | 0.93 | C26—H26A | 0.97 |
C15—C16 | 1.370 (5) | C26—H26B | 0.97 |
C15—H15 | 0.93 | O1—H1A | 0.82 |
N1—C1—C2 | 108.19 (19) | C12—C17—H17 | 119.5 |
N1—C1—C12 | 111.88 (19) | O2—C18—O3 | 122.5 (3) |
C2—C1—C12 | 115.2 (2) | O2—C18—C4 | 125.1 (3) |
N1—C1—H1 | 107.1 | O3—C18—C4 | 112.4 (2) |
C2—C1—H1 | 107.1 | O3—C19—C20 | 108.1 (3) |
C12—C1—H1 | 107.1 | O3—C19—H19A | 110.1 |
C3—C2—C1 | 111.97 (19) | C20—C19—H19A | 110.1 |
C3—C2—H2A | 109.2 | O3—C19—H19B | 110.1 |
C1—C2—H2A | 109.2 | C20—C19—H19B | 110.1 |
C3—C2—H2B | 109.2 | H19A—C19—H19B | 108.4 |
C1—C2—H2B | 109.2 | C19—C20—H20A | 109.5 |
H2A—C2—H2B | 107.9 | C19—C20—H20B | 109.5 |
O1—C3—C4 | 124.3 (2) | H20A—C20—H20B | 109.5 |
O1—C3—C2 | 113.0 (2) | C19—C20—H20C | 109.5 |
C4—C3—C2 | 122.7 (2) | H20A—C20—H20C | 109.5 |
C3—C4—C18 | 119.3 (2) | H20B—C20—H20C | 109.5 |
C3—C4—C5 | 122.7 (2) | O4—C21—N1 | 121.5 (2) |
C18—C4—C5 | 117.8 (2) | O4—C21—C22 | 118.3 (2) |
N1—C5—C4 | 111.03 (18) | N1—C21—C22 | 120.2 (2) |
N1—C5—C6 | 112.77 (18) | N2—C22—C21 | 114.6 (2) |
C4—C5—C6 | 114.10 (19) | N2—C22—H22A | 108.6 |
N1—C5—H5 | 106.1 | C21—C22—H22A | 108.6 |
C4—C5—H5 | 106.1 | N2—C22—H22B | 108.6 |
C6—C5—H5 | 106.1 | C21—C22—H22B | 108.6 |
C7—C6—C11 | 118.5 (2) | H22A—C22—H22B | 107.6 |
C7—C6—C5 | 122.6 (2) | N2—C23—C24 | 112.5 (3) |
C11—C6—C5 | 118.8 (2) | N2—C23—H23A | 109.1 |
C6—C7—C8 | 121.1 (3) | C24—C23—H23A | 109.1 |
C6—C7—H7 | 119.4 | N2—C23—H23B | 109.1 |
C8—C7—H7 | 119.4 | C24—C23—H23B | 109.1 |
C9—C8—C7 | 119.8 (3) | H23A—C23—H23B | 107.8 |
C9—C8—H8 | 120.1 | C23—C24—S1 | 112.8 (2) |
C7—C8—H8 | 120.1 | C23—C24—H24A | 109.0 |
C8—C9—C10 | 120.0 (3) | S1—C24—H24A | 109.0 |
C8—C9—H9 | 120.0 | C23—C24—H24B | 109.0 |
C10—C9—H9 | 120.0 | S1—C24—H24B | 109.0 |
C9—C10—C11 | 120.4 (3) | H24A—C24—H24B | 107.8 |
C9—C10—H10 | 119.8 | C26—C25—S1 | 113.3 (3) |
C11—C10—H10 | 119.8 | C26—C25—H25A | 108.9 |
C6—C11—C10 | 120.1 (3) | S1—C25—H25A | 108.9 |
C6—C11—H11 | 119.9 | C26—C25—H25B | 108.9 |
C10—C11—H11 | 119.9 | S1—C25—H25B | 108.9 |
C13—C12—C17 | 118.2 (2) | H25A—C25—H25B | 107.7 |
C13—C12—C1 | 122.8 (2) | N2—C26—C25 | 112.8 (3) |
C17—C12—C1 | 118.9 (2) | N2—C26—H26A | 109.0 |
C14—C13—C12 | 120.4 (3) | C25—C26—H26A | 109.0 |
C14—C13—H13 | 119.8 | N2—C26—H26B | 109.0 |
C12—C13—H13 | 119.8 | C25—C26—H26B | 109.0 |
C15—C14—C13 | 120.7 (3) | H26A—C26—H26B | 107.8 |
C15—C14—H14 | 119.7 | C21—N1—C5 | 117.2 (2) |
C13—C14—H14 | 119.7 | C21—N1—C1 | 123.8 (2) |
C14—C15—C16 | 119.7 (3) | C5—N1—C1 | 116.92 (18) |
C14—C15—H15 | 120.2 | C22—N2—C23 | 111.0 (2) |
C16—C15—H15 | 120.2 | C22—N2—C26 | 108.1 (2) |
C15—C16—C17 | 120.1 (3) | C23—N2—C26 | 110.4 (2) |
C15—C16—H16 | 119.9 | C3—O1—H1A | 109.5 |
C17—C16—H16 | 119.9 | C18—O3—C19 | 117.6 (3) |
C16—C17—C12 | 120.9 (3) | C25—S1—C24 | 96.42 (16) |
C16—C17—H17 | 119.5 | ||
N1—C1—C2—C3 | −48.5 (3) | C13—C12—C17—C16 | 1.0 (4) |
C12—C1—C2—C3 | 77.5 (3) | C1—C12—C17—C16 | −174.8 (2) |
C1—C2—C3—O1 | −159.7 (2) | C3—C4—C18—O2 | 11.3 (5) |
C1—C2—C3—C4 | 22.2 (3) | C5—C4—C18—O2 | −172.8 (3) |
O1—C3—C4—C18 | −3.2 (4) | C3—C4—C18—O3 | −167.2 (2) |
C2—C3—C4—C18 | 174.5 (2) | C5—C4—C18—O3 | 8.8 (3) |
O1—C3—C4—C5 | −179.0 (2) | O4—C21—C22—N2 | 114.2 (3) |
C2—C3—C4—C5 | −1.2 (4) | N1—C21—C22—N2 | −66.5 (3) |
C3—C4—C5—N1 | 8.2 (3) | N2—C23—C24—S1 | 63.1 (3) |
C18—C4—C5—N1 | −167.6 (2) | S1—C25—C26—N2 | −62.4 (3) |
C3—C4—C5—C6 | −120.6 (3) | O4—C21—N1—C5 | 5.6 (4) |
C18—C4—C5—C6 | 63.6 (3) | C22—C21—N1—C5 | −173.6 (2) |
N1—C5—C6—C7 | −105.9 (3) | O4—C21—N1—C1 | 168.7 (2) |
C4—C5—C6—C7 | 22.0 (3) | C22—C21—N1—C1 | −10.6 (4) |
N1—C5—C6—C11 | 77.1 (3) | C4—C5—N1—C21 | 125.2 (2) |
C4—C5—C6—C11 | −155.0 (2) | C6—C5—N1—C21 | −105.3 (2) |
C11—C6—C7—C8 | 0.4 (4) | C4—C5—N1—C1 | −39.1 (3) |
C5—C6—C7—C8 | −176.5 (2) | C6—C5—N1—C1 | 90.4 (2) |
C6—C7—C8—C9 | −0.2 (4) | C2—C1—N1—C21 | −103.0 (2) |
C7—C8—C9—C10 | −0.3 (5) | C12—C1—N1—C21 | 129.1 (2) |
C8—C9—C10—C11 | 0.6 (5) | C2—C1—N1—C5 | 60.1 (3) |
C7—C6—C11—C10 | −0.2 (4) | C12—C1—N1—C5 | −67.8 (2) |
C5—C6—C11—C10 | 176.9 (3) | C21—C22—N2—C23 | −59.2 (3) |
C9—C10—C11—C6 | −0.3 (5) | C21—C22—N2—C26 | 179.6 (2) |
N1—C1—C12—C13 | 126.8 (2) | C24—C23—N2—C22 | 175.6 (2) |
C2—C1—C12—C13 | 2.8 (3) | C24—C23—N2—C26 | −64.6 (3) |
N1—C1—C12—C17 | −57.6 (3) | C25—C26—N2—C22 | −174.2 (2) |
C2—C1—C12—C17 | 178.3 (2) | C25—C26—N2—C23 | 64.2 (3) |
C17—C12—C13—C14 | −1.1 (4) | O2—C18—O3—C19 | 7.2 (4) |
C1—C12—C13—C14 | 174.5 (2) | C4—C18—O3—C19 | −174.3 (3) |
C12—C13—C14—C15 | 0.3 (4) | C20—C19—O3—C18 | 110.8 (6) |
C13—C14—C15—C16 | 0.6 (5) | C26—C25—S1—C24 | 51.6 (3) |
C14—C15—C16—C17 | −0.7 (5) | C23—C24—S1—C25 | −51.8 (3) |
C15—C16—C17—C12 | −0.1 (4) |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1A···O2 | 0.82 | 1.92 | 2.627 (3) | 144 |
C2—H2A···O4i | 0.97 | 2.46 | 3.306 (3) | 145 |
C10—H10···O4ii | 0.93 | 2.41 | 3.339 (4) | 178 |
Symmetry codes: (i) −x+1, −y+1, −z; (ii) −x, −y+1, −z. |
Experimental details
Crystal data | |
Chemical formula | C26H30N2O4S |
Mr | 466.58 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 292 |
a, b, c (Å) | 10.9561 (6), 9.5665 (6), 22.9011 (12) |
β (°) | 93.575 (3) |
V (Å3) | 2395.6 (2) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.17 |
Crystal size (mm) | 0.26 × 0.23 × 0.20 |
Data collection | |
Diffractometer | Bruker SMART APEXII area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2008) |
Tmin, Tmax | 0.957, 0.967 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 21473, 5677, 3669 |
Rint | 0.029 |
(sin θ/λ)max (Å−1) | 0.666 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.065, 0.217, 1.04 |
No. of reflections | 5677 |
No. of parameters | 299 |
No. of restraints | 1 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.75, −0.56 |
Computer programs: APEX2 (Bruker, 2008), SAINT (Bruker, 2008), SHELXS97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997), SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1A···O2 | 0.82 | 1.92 | 2.627 (3) | 144 |
C2—H2A···O4i | 0.97 | 2.46 | 3.306 (3) | 145 |
C10—H10···O4ii | 0.93 | 2.41 | 3.339 (4) | 178 |
Symmetry codes: (i) −x+1, −y+1, −z; (ii) −x, −y+1, −z. |
Acknowledgements
GA and YTJ are grateful for the support provided by the Corporate-affiliated Research Institute of Academic–Industrial–Institutional Cooperation Improvement Business No. S7080008110. SS and DV thank the TBI X-ray Facility, CAS in Crystallography and Biophysics, University of Madras, India, for the data collection and the University Grants Commission (UGC & SAP) for financial support.
References
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The asymmetric unit of N-chloroacetyl-3-carboxyethyl-2,6-diphenyl-4-hydroxy-Δ3-tetrahydropyridine obtained from the chloroacetylation of 3-carboxyethyl-2,6-diphenylpiperidin-4-one contains two crystallographically independent molecules wherein the two phenyl groups are oriented axially to avoid the steric repulsion (A1,3 strain; Chow et al., 1968) with coplanar –NCOCH2 group besides adopting the non-chair conformation for the tetrahydropyridine ring (Aridoss et al., 2008). However, it was confirmed by X-ray study that the two phenyl groups take up anti orientation with each other upon replacement of chlorine by morpholine system (Aridoss et al., 2010). In order to study the orientation of phenyl groups and conformation of tetrahydropyridine ring system upon substitution of thiomorpholine instead of morpholine, the current study has been undertaken.
The sum of bond angles around atoms N1 (358.0 (2)°) and N2 (329.5 (2)°) of the tetrahydropyridine and the thiomorpholine rings in the molecule is in accordance with sp2 and sp3 hybridizations. The thiomorpholine ring adopts a chair conformation. The tetrahydropyridine ring adopts a half-chair conformation. The puckering parameters (Cremer & Pople, 1975) and the smallest displacement asymmetry parameters (Nardelli, 1983) for the thiomorpholine/tetrahydropyridine ring are q2 = 0.021 (3)/0.355 (2) Å, q3 = 0.631 (3)/-0.295 (2) Å; QT = 0.632 (3)/0.461 (2) Å and θ = 1.8 (3)/129.8 (3)°. The dihedral angle between the two phenyl ring is 33.4 (2)°. The thiomorpholine and tetrahydropyridine rings are connected by the ethanone. The ethyl acetate group shows an extended conformation [C18—O3—C19—C20 = 110.8 (6)°]. The molecular structure is stabilized by a strong O—H···O hydrogen bond, wherein, atom O1 acts as a donor to O2, generating an S(6) motif.
Atoms C2 and C10 act as donors to form hydrogen bonds with atom O4 as an aceptor. In the crystal structure, the molecules at (x,y,z) and (1 - x,1 - y,-z), (2 - x,1 - y,-z) are linked by C—H···O hydrogen bonds into a ribbon-like structure along the a axis; the ribbons contain R22(12) and R22(16) ring motifs.