organic compounds
Ethyl 4-hydroxy-2,6-diphenyl-1-[2-(piperidin-1-yl)acetyl]-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, C27H32N2O4, the piperidine and tetrahydropyridine rings adopt chair and half-chair conformations, respectively. The dihedral angle between the two phenyl rings is 32.9 (1)°. The molecular structure is stabilized by a strong intramolecular O—H⋯O hydrogen bond, generating an S(6) motif. In the crystal, intermolecular C—H⋯O interactions form a ribbon-like structure along the a axis.
Related literature
For the biological activity of piperidines, see: Aridoss et al. (2008, 2010). For related structures, see: Subha Nandhini et al. (2003); Aridoss et al. (2009a,b); 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/S1600536810026619/ci5118sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810026619/ci5118Isup2.hkl
A mixture of piperidine (1 equiv.), N-chloroacetyl-3-carboxyethyl-2,6-diphenylpiperidin-4-one (1 equiv.) and anhydrous potassium carbonate (2 equiv.) in benzene was refluxed on an oil bath until its completion (Aridoss et al., 2010). The crude product obtained after usual work-up upon purification by
followed by re-crystallization in ethanol yielded fine 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 1.5Ueq(C) for methyl H and 1.2Ueq(C) for other H atoms.
Piperidine class of compounds is the valued
in the field of medicinal chemistry. We are interested in the title compound as similar type of derivatives have been found to exhibit remarkable antibacterial and antitumor properties (Aridoss et al., 2008, 2010). Recently, we have reported the crystal structures of few tetrahydropyridine derivatives (Aridoss et al., 2009a, 2009b). As part of our ongoing studies on establishing the conformation of the compounds through X-ray studies, we herein report the of the title compound.In the present structure, the piperidine ring adopts a chair conformation and the tetrahydropyridine ring is in a half-chair conformation. The sum of the bond angles around atoms N1 (357.8 (9)°) and N2 (329.6 (6)°) indicate sp2 and sp3 hybridizations, respectively. The puckering parameters (Cremer & Pople, 1975) and the smallest displacement asymmetry parameters (Nardelli, 1983) for the piperidine/tetrahydropyridine ring are q2 = 0.022 (3)/0.354 (4) Å, q3 = -0.572 (3)/0.293 (2) Å, QT = 0.572 (3)/0.459 (2) Å, and θ = 179.2 (3)/50.4 (2)°. The dihedral angle between the two phenyl rings is 32.9 (1)°. The piperidine and tetrahydropyridine rings are connected by the ethanone. The ethyl acetate group shows an extended conformation [C27—C26—O4—C25 = -116.4 (5)°]. The molecular structure is stabilized by a strong O—H···O hydrogen bond, wherein, atom O2 acts as a donor to O3, generating an S(6) motif.
Atoms C2 and C10 act as donors to form hydrogen bonds with atom O1 as an aceptor. In the
the molecules at (x,y,z), (-x,-y,-z) and (1 - x,-y,-z) are linked into a ribbon-like structure along the a axis by C—H···O hydrogen bonds; the ribbons contain R22(12) and R22(16) ring motifs.For the biological activity of piperidines, see: Aridoss et al. (2008, 2010). For related structures, see: Subha Nandhini et al. (2003); Aridoss et al. (2009a,b); 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).C27H32N2O4 | F(000) = 960 |
Mr = 448.55 | Dx = 1.230 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 1525 reflections |
a = 10.7936 (6) Å | θ = 1.8–28.3° |
b = 9.6752 (6) Å | µ = 0.08 mm−1 |
c = 23.2335 (13) Å | T = 292 K |
β = 93.213 (3)° | Block, colourless |
V = 2422.5 (2) Å3 | 0.25 × 0.23 × 0.20 mm |
Z = 4 |
Bruker SMART APEXII area-detector diffractometer | 5870 independent reflections |
Radiation source: fine-focus sealed tube | 3631 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.025 |
ω and φ scans | θmax = 28.3°, θmin = 1.8° |
Absorption correction: multi-scan (SADABS; Bruker, 2008) | h = −14→14 |
Tmin = 0.979, Tmax = 0.984 | k = −12→12 |
21907 measured reflections | l = −30→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)] = 0.058 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.193 | H-atom parameters constrained |
S = 1.05 | w = 1/[σ2(Fo2) + (0.0946P)2 + 0.5359P] where P = (Fo2 + 2Fc2)/3 |
5870 reflections | (Δ/σ)max = 0.001 |
299 parameters | Δρmax = 0.58 e Å−3 |
1 restraint | Δρmin = −0.37 e Å−3 |
C27H32N2O4 | V = 2422.5 (2) Å3 |
Mr = 448.55 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 10.7936 (6) Å | µ = 0.08 mm−1 |
b = 9.6752 (6) Å | T = 292 K |
c = 23.2335 (13) Å | 0.25 × 0.23 × 0.20 mm |
β = 93.213 (3)° |
Bruker SMART APEXII area-detector diffractometer | 5870 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2008) | 3631 reflections with I > 2σ(I) |
Tmin = 0.979, Tmax = 0.984 | Rint = 0.025 |
21907 measured reflections |
R[F2 > 2σ(F2)] = 0.058 | 1 restraint |
wR(F2) = 0.193 | H-atom parameters constrained |
S = 1.05 | Δρmax = 0.58 e Å−3 |
5870 reflections | Δρmin = −0.37 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 | ||
C27 | 0.3740 (4) | −0.0409 (8) | 0.2481 (2) | 0.206 (3) | |
H27A | 0.4323 | −0.0751 | 0.2218 | 0.308* | |
H27B | 0.3930 | −0.0787 | 0.2857 | 0.308* | |
H27C | 0.3791 | 0.0581 | 0.2498 | 0.308* | |
C1 | 0.08942 (18) | 0.31589 (19) | 0.01812 (8) | 0.0470 (4) | |
H1 | 0.0592 | 0.3326 | −0.0218 | 0.056* | |
C2 | −0.02445 (18) | 0.2987 (2) | 0.05340 (9) | 0.0539 (5) | |
H2A | −0.0605 | 0.3888 | 0.0600 | 0.065* | |
H2B | −0.0859 | 0.2436 | 0.0317 | 0.065* | |
C3 | 0.00608 (18) | 0.2312 (2) | 0.10962 (9) | 0.0528 (5) | |
C4 | 0.10915 (17) | 0.1540 (2) | 0.12035 (8) | 0.0492 (5) | |
C5 | 0.20372 (17) | 0.1306 (2) | 0.07547 (8) | 0.0455 (4) | |
H5 | 0.2104 | 0.0302 | 0.0711 | 0.055* | |
C6 | 0.33462 (17) | 0.1815 (2) | 0.09306 (8) | 0.0467 (4) | |
C7 | 0.35769 (19) | 0.2807 (3) | 0.13484 (9) | 0.0573 (5) | |
H7 | 0.2915 | 0.3222 | 0.1521 | 0.069* | |
C8 | 0.4785 (2) | 0.3197 (3) | 0.15163 (11) | 0.0733 (7) | |
H8 | 0.4926 | 0.3864 | 0.1801 | 0.088* | |
C9 | 0.5763 (2) | 0.2598 (3) | 0.12621 (13) | 0.0821 (8) | |
H9 | 0.6571 | 0.2854 | 0.1374 | 0.098* | |
C10 | 0.5550 (2) | 0.1619 (3) | 0.08418 (14) | 0.0822 (8) | |
H10 | 0.6215 | 0.1217 | 0.0667 | 0.099* | |
C11 | 0.4350 (2) | 0.1225 (3) | 0.06762 (11) | 0.0645 (6) | |
H11 | 0.4215 | 0.0557 | 0.0392 | 0.077* | |
C12 | 0.17351 (17) | 0.4373 (2) | 0.03603 (8) | 0.0462 (4) | |
C13 | 0.1481 (2) | 0.5271 (2) | 0.08002 (10) | 0.0580 (5) | |
H13 | 0.0799 | 0.5107 | 0.1018 | 0.070* | |
C14 | 0.2225 (2) | 0.6412 (3) | 0.09232 (12) | 0.0725 (7) | |
H14 | 0.2044 | 0.7001 | 0.1223 | 0.087* | |
C15 | 0.3227 (3) | 0.6673 (3) | 0.06033 (13) | 0.0771 (7) | |
H15 | 0.3720 | 0.7446 | 0.0682 | 0.093* | |
C16 | 0.3502 (2) | 0.5787 (3) | 0.01649 (13) | 0.0734 (7) | |
H16 | 0.4186 | 0.5956 | −0.0051 | 0.088* | |
C17 | 0.2763 (2) | 0.4647 (2) | 0.00461 (10) | 0.0591 (5) | |
H17 | 0.2957 | 0.4052 | −0.0250 | 0.071* | |
C18 | 0.15252 (19) | 0.0927 (2) | −0.02602 (9) | 0.0522 (5) | |
C19 | 0.0955 (2) | 0.1375 (2) | −0.08475 (9) | 0.0581 (5) | |
H19A | 0.0885 | 0.0571 | −0.1097 | 0.070* | |
H19B | 0.0122 | 0.1714 | −0.0798 | 0.070* | |
C20 | 0.2914 (2) | 0.1989 (3) | −0.12236 (11) | 0.0752 (7) | |
H20A | 0.2891 | 0.1152 | −0.1454 | 0.090* | |
H20B | 0.3334 | 0.1777 | −0.0854 | 0.090* | |
C21 | 0.3637 (3) | 0.3090 (4) | −0.15246 (13) | 0.0973 (10) | |
H21A | 0.3713 | 0.3905 | −0.1282 | 0.117* | |
H21B | 0.4466 | 0.2752 | −0.1585 | 0.117* | |
C22 | 0.2998 (3) | 0.3470 (4) | −0.20973 (12) | 0.0988 (10) | |
H22A | 0.3428 | 0.4237 | −0.2267 | 0.119* | |
H22B | 0.3018 | 0.2690 | −0.2359 | 0.119* | |
C23 | 0.1672 (3) | 0.3868 (4) | −0.20086 (12) | 0.0906 (9) | |
H23A | 0.1240 | 0.4028 | −0.2380 | 0.109* | |
H23B | 0.1658 | 0.4722 | −0.1790 | 0.109* | |
C24 | 0.1010 (2) | 0.2751 (3) | −0.16913 (10) | 0.0691 (6) | |
H24A | 0.0169 | 0.3049 | −0.1631 | 0.083* | |
H24B | 0.0964 | 0.1920 | −0.1925 | 0.083* | |
C25 | 0.1255 (2) | 0.0802 (3) | 0.17438 (9) | 0.0638 (6) | |
C26 | 0.2522 (3) | −0.0805 (4) | 0.22867 (13) | 0.1089 (12) | |
H26A | 0.1940 | −0.0565 | 0.2574 | 0.131* | |
H26B | 0.2487 | −0.1797 | 0.2226 | 0.131* | |
N1 | 0.15713 (15) | 0.18363 (16) | 0.01878 (6) | 0.0461 (4) | |
N2 | 0.16459 (16) | 0.24368 (19) | −0.11332 (7) | 0.0543 (4) | |
O1 | 0.19378 (17) | −0.02442 (17) | −0.02074 (7) | 0.0726 (5) | |
O2 | −0.08101 (14) | 0.2495 (2) | 0.14807 (7) | 0.0731 (5) | |
H2 | −0.0613 | 0.2069 | 0.1777 | 0.110* | |
O3 | 0.05991 (18) | 0.0935 (3) | 0.21512 (7) | 0.0941 (7) | |
O4 | 0.21980 (15) | −0.0091 (2) | 0.17514 (7) | 0.0785 (5) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C27 | 0.141 (4) | 0.309 (8) | 0.158 (4) | −0.045 (4) | −0.073 (3) | 0.136 (5) |
C1 | 0.0501 (10) | 0.0474 (11) | 0.0429 (9) | 0.0052 (9) | −0.0033 (8) | 0.0027 (8) |
C2 | 0.0427 (10) | 0.0555 (12) | 0.0628 (12) | 0.0028 (9) | −0.0029 (9) | 0.0008 (10) |
C3 | 0.0404 (10) | 0.0636 (13) | 0.0547 (11) | −0.0071 (9) | 0.0064 (8) | −0.0044 (9) |
C4 | 0.0434 (10) | 0.0597 (12) | 0.0447 (10) | −0.0055 (9) | 0.0030 (8) | 0.0042 (9) |
C5 | 0.0479 (10) | 0.0453 (10) | 0.0434 (10) | 0.0053 (8) | 0.0035 (8) | 0.0041 (8) |
C6 | 0.0441 (10) | 0.0515 (11) | 0.0447 (10) | 0.0068 (8) | 0.0050 (7) | 0.0113 (8) |
C7 | 0.0439 (10) | 0.0746 (14) | 0.0537 (11) | 0.0018 (10) | 0.0044 (8) | 0.0000 (10) |
C8 | 0.0549 (13) | 0.0920 (19) | 0.0722 (15) | −0.0139 (13) | −0.0054 (11) | 0.0022 (13) |
C9 | 0.0409 (12) | 0.105 (2) | 0.100 (2) | −0.0045 (13) | −0.0010 (12) | 0.0259 (18) |
C10 | 0.0473 (13) | 0.094 (2) | 0.107 (2) | 0.0206 (13) | 0.0232 (13) | 0.0154 (17) |
C11 | 0.0547 (12) | 0.0673 (14) | 0.0727 (14) | 0.0151 (11) | 0.0142 (10) | 0.0038 (12) |
C12 | 0.0482 (10) | 0.0447 (10) | 0.0454 (10) | 0.0058 (8) | −0.0013 (8) | 0.0049 (8) |
C13 | 0.0555 (12) | 0.0594 (13) | 0.0593 (12) | 0.0022 (10) | 0.0044 (9) | −0.0082 (10) |
C14 | 0.0709 (15) | 0.0628 (15) | 0.0828 (16) | 0.0013 (13) | −0.0041 (13) | −0.0187 (13) |
C15 | 0.0658 (15) | 0.0561 (14) | 0.108 (2) | −0.0080 (12) | −0.0114 (14) | −0.0023 (14) |
C16 | 0.0580 (13) | 0.0686 (16) | 0.0944 (18) | −0.0040 (12) | 0.0121 (12) | 0.0157 (14) |
C17 | 0.0595 (12) | 0.0563 (13) | 0.0621 (13) | 0.0044 (11) | 0.0102 (10) | 0.0043 (10) |
C18 | 0.0551 (11) | 0.0497 (12) | 0.0517 (11) | −0.0046 (10) | 0.0037 (9) | −0.0045 (9) |
C19 | 0.0647 (13) | 0.0631 (13) | 0.0458 (11) | −0.0097 (11) | −0.0023 (9) | −0.0083 (9) |
C20 | 0.0583 (13) | 0.100 (2) | 0.0676 (15) | 0.0072 (13) | 0.0038 (11) | −0.0019 (14) |
C21 | 0.0676 (16) | 0.146 (3) | 0.0796 (18) | −0.0136 (18) | 0.0192 (14) | 0.0062 (19) |
C22 | 0.091 (2) | 0.140 (3) | 0.0686 (17) | −0.0126 (19) | 0.0291 (15) | 0.0074 (18) |
C23 | 0.102 (2) | 0.110 (2) | 0.0614 (15) | 0.0077 (19) | 0.0183 (14) | 0.0161 (15) |
C24 | 0.0640 (14) | 0.0943 (18) | 0.0491 (12) | 0.0090 (13) | 0.0041 (10) | −0.0018 (12) |
C25 | 0.0497 (11) | 0.0903 (17) | 0.0512 (12) | −0.0120 (12) | 0.0019 (9) | 0.0152 (11) |
C26 | 0.105 (2) | 0.141 (3) | 0.0776 (18) | −0.011 (2) | −0.0199 (16) | 0.061 (2) |
N1 | 0.0521 (9) | 0.0445 (9) | 0.0413 (8) | 0.0040 (7) | 0.0006 (6) | 0.0013 (7) |
N2 | 0.0528 (10) | 0.0681 (11) | 0.0420 (8) | −0.0018 (9) | 0.0040 (7) | −0.0044 (8) |
O1 | 0.0955 (12) | 0.0527 (9) | 0.0690 (10) | 0.0110 (9) | −0.0002 (9) | −0.0110 (8) |
O2 | 0.0484 (8) | 0.1009 (13) | 0.0718 (10) | 0.0021 (8) | 0.0196 (7) | −0.0005 (9) |
O3 | 0.0797 (12) | 0.1485 (19) | 0.0562 (10) | −0.0009 (12) | 0.0214 (9) | 0.0255 (11) |
O4 | 0.0676 (10) | 0.1049 (14) | 0.0628 (10) | 0.0032 (10) | 0.0005 (8) | 0.0414 (9) |
C27—C26 | 1.418 (4) | C14—H14 | 0.93 |
C27—H27A | 0.96 | C15—C16 | 1.376 (4) |
C27—H27B | 0.96 | C15—H15 | 0.93 |
C27—H27C | 0.96 | C16—C17 | 1.379 (3) |
C1—N1 | 1.473 (2) | C16—H16 | 0.93 |
C1—C2 | 1.524 (3) | C17—H17 | 0.93 |
C1—C12 | 1.528 (3) | C18—O1 | 1.221 (3) |
C1—H1 | 0.98 | C18—N1 | 1.361 (3) |
C2—C3 | 1.481 (3) | C18—C19 | 1.528 (3) |
C2—H2A | 0.97 | C19—N2 | 1.452 (3) |
C2—H2B | 0.97 | C19—H19A | 0.97 |
C3—O2 | 1.344 (2) | C19—H19B | 0.97 |
C3—C4 | 1.352 (3) | C20—N2 | 1.463 (3) |
C4—C25 | 1.446 (3) | C20—C21 | 1.514 (4) |
C4—C5 | 1.516 (3) | C20—H20A | 0.97 |
C5—N1 | 1.475 (2) | C20—H20B | 0.97 |
C5—C6 | 1.530 (3) | C21—C22 | 1.509 (4) |
C5—H5 | 0.98 | C21—H21A | 0.97 |
C6—C7 | 1.378 (3) | C21—H21B | 0.97 |
C6—C11 | 1.386 (3) | C22—C23 | 1.508 (4) |
C7—C8 | 1.392 (3) | C22—H22A | 0.97 |
C7—H7 | 0.93 | C22—H22B | 0.97 |
C8—C9 | 1.367 (4) | C23—C24 | 1.510 (4) |
C8—H8 | 0.93 | C23—H23A | 0.97 |
C9—C10 | 1.371 (4) | C23—H23B | 0.97 |
C9—H9 | 0.93 | C24—N2 | 1.465 (3) |
C10—C11 | 1.384 (4) | C24—H24A | 0.97 |
C10—H10 | 0.93 | C24—H24B | 0.97 |
C11—H11 | 0.93 | C25—O3 | 1.220 (3) |
C12—C13 | 1.381 (3) | C25—O4 | 1.335 (3) |
C12—C17 | 1.388 (3) | C26—O4 | 1.448 (3) |
C13—C14 | 1.385 (3) | C26—H26A | 0.97 |
C13—H13 | 0.93 | C26—H26B | 0.97 |
C14—C15 | 1.369 (4) | O2—H2 | 0.82 |
C26—C27—H27A | 109.5 | C15—C16—H16 | 120.0 |
C26—C27—H27B | 109.5 | C17—C16—H16 | 120.0 |
H27A—C27—H27B | 109.5 | C16—C17—C12 | 121.2 (2) |
C26—C27—H27C | 109.5 | C16—C17—H17 | 119.4 |
H27A—C27—H27C | 109.5 | C12—C17—H17 | 119.4 |
H27B—C27—H27C | 109.5 | O1—C18—N1 | 121.68 (19) |
N1—C1—C2 | 108.30 (16) | O1—C18—C19 | 118.64 (19) |
N1—C1—C12 | 112.21 (15) | N1—C18—C19 | 119.68 (18) |
C2—C1—C12 | 114.98 (17) | N2—C19—C18 | 114.65 (17) |
N1—C1—H1 | 107.0 | N2—C19—H19A | 108.6 |
C2—C1—H1 | 107.0 | C18—C19—H19A | 108.6 |
C12—C1—H1 | 107.0 | N2—C19—H19B | 108.6 |
C3—C2—C1 | 112.11 (16) | C18—C19—H19B | 108.6 |
C3—C2—H2A | 109.2 | H19A—C19—H19B | 107.6 |
C1—C2—H2A | 109.2 | N2—C20—C21 | 111.6 (2) |
C3—C2—H2B | 109.2 | N2—C20—H20A | 109.3 |
C1—C2—H2B | 109.2 | C21—C20—H20A | 109.3 |
H2A—C2—H2B | 107.9 | N2—C20—H20B | 109.3 |
O2—C3—C4 | 123.3 (2) | C21—C20—H20B | 109.3 |
O2—C3—C2 | 113.52 (18) | H20A—C20—H20B | 108.0 |
C4—C3—C2 | 123.13 (18) | C22—C21—C20 | 110.9 (3) |
C3—C4—C25 | 119.49 (19) | C22—C21—H21A | 109.5 |
C3—C4—C5 | 122.28 (17) | C20—C21—H21A | 109.5 |
C25—C4—C5 | 117.99 (18) | C22—C21—H21B | 109.5 |
N1—C5—C4 | 110.69 (15) | C20—C21—H21B | 109.5 |
N1—C5—C6 | 112.96 (15) | H21A—C21—H21B | 108.0 |
C4—C5—C6 | 114.55 (16) | C23—C22—C21 | 109.4 (2) |
N1—C5—H5 | 106.0 | C23—C22—H22A | 109.8 |
C4—C5—H5 | 106.0 | C21—C22—H22A | 109.8 |
C6—C5—H5 | 106.0 | C23—C22—H22B | 109.8 |
C7—C6—C11 | 118.2 (2) | C21—C22—H22B | 109.8 |
C7—C6—C5 | 122.69 (17) | H22A—C22—H22B | 108.2 |
C11—C6—C5 | 119.04 (19) | C22—C23—C24 | 111.3 (3) |
C6—C7—C8 | 121.1 (2) | C22—C23—H23A | 109.4 |
C6—C7—H7 | 119.5 | C24—C23—H23A | 109.4 |
C8—C7—H7 | 119.5 | C22—C23—H23B | 109.4 |
C9—C8—C7 | 119.8 (3) | C24—C23—H23B | 109.4 |
C9—C8—H8 | 120.1 | H23A—C23—H23B | 108.0 |
C7—C8—H8 | 120.1 | N2—C24—C23 | 111.7 (2) |
C8—C9—C10 | 119.9 (2) | N2—C24—H24A | 109.3 |
C8—C9—H9 | 120.1 | C23—C24—H24A | 109.3 |
C10—C9—H9 | 120.1 | N2—C24—H24B | 109.3 |
C9—C10—C11 | 120.4 (2) | C23—C24—H24B | 109.3 |
C9—C10—H10 | 119.8 | H24A—C24—H24B | 107.9 |
C11—C10—H10 | 119.8 | O3—C25—O4 | 122.2 (2) |
C10—C11—C6 | 120.6 (2) | O3—C25—C4 | 125.0 (2) |
C10—C11—H11 | 119.7 | O4—C25—C4 | 112.78 (19) |
C6—C11—H11 | 119.7 | C27—C26—O4 | 108.6 (3) |
C13—C12—C17 | 117.8 (2) | C27—C26—H26A | 110.0 |
C13—C12—C1 | 123.09 (18) | O4—C26—H26A | 110.0 |
C17—C12—C1 | 118.96 (18) | C27—C26—H26B | 110.0 |
C12—C13—C14 | 121.2 (2) | O4—C26—H26B | 110.0 |
C12—C13—H13 | 119.4 | H26A—C26—H26B | 108.4 |
C14—C13—H13 | 119.4 | C18—N1—C1 | 123.80 (16) |
C15—C14—C13 | 120.1 (2) | C18—N1—C5 | 117.01 (16) |
C15—C14—H14 | 120.0 | C1—N1—C5 | 117.08 (14) |
C13—C14—H14 | 120.0 | C19—N2—C20 | 111.43 (19) |
C14—C15—C16 | 119.8 (2) | C19—N2—C24 | 108.92 (17) |
C14—C15—H15 | 120.1 | C20—N2—C24 | 109.31 (17) |
C16—C15—H15 | 120.1 | C3—O2—H2 | 109.5 |
C15—C16—C17 | 120.0 (2) | C25—O4—C26 | 117.9 (2) |
N1—C1—C2—C3 | 47.4 (2) | C13—C12—C17—C16 | −0.6 (3) |
C12—C1—C2—C3 | −79.0 (2) | C1—C12—C17—C16 | 175.4 (2) |
C1—C2—C3—O2 | 161.99 (18) | O1—C18—C19—N2 | −112.8 (2) |
C1—C2—C3—C4 | −20.6 (3) | N1—C18—C19—N2 | 66.8 (3) |
O2—C3—C4—C25 | 3.4 (3) | N2—C20—C21—C22 | −57.8 (3) |
C2—C3—C4—C25 | −173.7 (2) | C20—C21—C22—C23 | 53.9 (4) |
O2—C3—C4—C5 | 177.68 (19) | C21—C22—C23—C24 | −53.7 (4) |
C2—C3—C4—C5 | 0.6 (3) | C22—C23—C24—N2 | 57.3 (3) |
C3—C4—C5—N1 | −8.9 (3) | C3—C4—C25—O3 | −8.8 (4) |
C25—C4—C5—N1 | 165.46 (18) | C5—C4—C25—O3 | 176.7 (2) |
C3—C4—C5—C6 | 120.3 (2) | C3—C4—C25—O4 | 169.4 (2) |
C25—C4—C5—C6 | −65.4 (2) | C5—C4—C25—O4 | −5.0 (3) |
N1—C5—C6—C7 | 106.2 (2) | O1—C18—N1—C1 | −168.4 (2) |
C4—C5—C6—C7 | −21.8 (3) | C19—C18—N1—C1 | 12.1 (3) |
N1—C5—C6—C11 | −76.2 (2) | O1—C18—N1—C5 | −5.5 (3) |
C4—C5—C6—C11 | 155.77 (19) | C19—C18—N1—C5 | 175.05 (17) |
C11—C6—C7—C8 | −0.7 (3) | C2—C1—N1—C18 | 102.4 (2) |
C5—C6—C7—C8 | 176.9 (2) | C12—C1—N1—C18 | −129.59 (19) |
C6—C7—C8—C9 | 0.4 (4) | C2—C1—N1—C5 | −60.5 (2) |
C7—C8—C9—C10 | 0.2 (4) | C12—C1—N1—C5 | 67.5 (2) |
C8—C9—C10—C11 | −0.5 (4) | C4—C5—N1—C18 | −123.85 (19) |
C9—C10—C11—C6 | 0.2 (4) | C6—C5—N1—C18 | 106.2 (2) |
C7—C6—C11—C10 | 0.4 (3) | C4—C5—N1—C1 | 40.3 (2) |
C5—C6—C11—C10 | −177.3 (2) | C6—C5—N1—C1 | −89.7 (2) |
N1—C1—C12—C13 | −125.6 (2) | C18—C19—N2—C20 | 58.5 (2) |
C2—C1—C12—C13 | −1.2 (3) | C18—C19—N2—C24 | 179.17 (19) |
N1—C1—C12—C17 | 58.6 (2) | C21—C20—N2—C19 | 179.7 (2) |
C2—C1—C12—C17 | −177.07 (17) | C21—C20—N2—C24 | 59.2 (3) |
C17—C12—C13—C14 | 0.2 (3) | C23—C24—N2—C19 | 179.1 (2) |
C1—C12—C13—C14 | −175.7 (2) | C23—C24—N2—C20 | −58.9 (3) |
C12—C13—C14—C15 | 0.6 (4) | O3—C25—O4—C26 | −6.9 (4) |
C13—C14—C15—C16 | −0.9 (4) | C4—C25—O4—C26 | 174.8 (2) |
C14—C15—C16—C17 | 0.5 (4) | C27—C26—O4—C25 | −116.4 (5) |
C15—C16—C17—C12 | 0.2 (4) |
D—H···A | D—H | H···A | D···A | D—H···A |
O2—H2···O3 | 0.82 | 1.88 | 2.598 (3) | 145 |
C2—H2B···O1i | 0.97 | 2.43 | 3.286 (3) | 148 |
C10—H10···O1ii | 0.93 | 2.50 | 3.427 (3) | 177 |
Symmetry codes: (i) −x, −y, −z; (ii) −x+1, −y, −z. |
Experimental details
Crystal data | |
Chemical formula | C27H32N2O4 |
Mr | 448.55 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 292 |
a, b, c (Å) | 10.7936 (6), 9.6752 (6), 23.2335 (13) |
β (°) | 93.213 (3) |
V (Å3) | 2422.5 (2) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.08 |
Crystal size (mm) | 0.25 × 0.23 × 0.20 |
Data collection | |
Diffractometer | Bruker SMART APEXII area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2008) |
Tmin, Tmax | 0.979, 0.984 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 21907, 5870, 3631 |
Rint | 0.025 |
(sin θ/λ)max (Å−1) | 0.667 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.058, 0.193, 1.05 |
No. of reflections | 5870 |
No. of parameters | 299 |
No. of restraints | 1 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.58, −0.37 |
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 |
O2—H2···O3 | 0.82 | 1.88 | 2.598 (3) | 145 |
C2—H2B···O1i | 0.97 | 2.43 | 3.286 (3) | 148 |
C10—H10···O1ii | 0.93 | 2.50 | 3.427 (3) | 177 |
Symmetry codes: (i) −x, −y, −z; (ii) −x+1, −y, −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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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.
Piperidine class of compounds is the valued heterocyclic compounds in the field of medicinal chemistry. We are interested in the title compound as similar type of derivatives have been found to exhibit remarkable antibacterial and antitumor properties (Aridoss et al., 2008, 2010). Recently, we have reported the crystal structures of few tetrahydropyridine derivatives (Aridoss et al., 2009a, 2009b). As part of our ongoing studies on establishing the conformation of the compounds through X-ray studies, we herein report the crystal structure of the title compound.
In the present structure, the piperidine ring adopts a chair conformation and the tetrahydropyridine ring is in a half-chair conformation. The sum of the bond angles around atoms N1 (357.8 (9)°) and N2 (329.6 (6)°) indicate sp2 and sp3 hybridizations, respectively. The puckering parameters (Cremer & Pople, 1975) and the smallest displacement asymmetry parameters (Nardelli, 1983) for the piperidine/tetrahydropyridine ring are q2 = 0.022 (3)/0.354 (4) Å, q3 = -0.572 (3)/0.293 (2) Å, QT = 0.572 (3)/0.459 (2) Å, and θ = 179.2 (3)/50.4 (2)°. The dihedral angle between the two phenyl rings is 32.9 (1)°. The piperidine and tetrahydropyridine rings are connected by the ethanone. The ethyl acetate group shows an extended conformation [C27—C26—O4—C25 = -116.4 (5)°]. The molecular structure is stabilized by a strong O—H···O hydrogen bond, wherein, atom O2 acts as a donor to O3, generating an S(6) motif.
Atoms C2 and C10 act as donors to form hydrogen bonds with atom O1 as an aceptor. In the crystal structure, the molecules at (x,y,z), (-x,-y,-z) and (1 - x,-y,-z) are linked into a ribbon-like structure along the a axis by C—H···O hydrogen bonds; the ribbons contain R22(12) and R22(16) ring motifs.