organic compounds
5-(4,4′′-Difluoro-5′-hydroxy-1,1′:3′,1′′-terphenyl-4′-yl)-3-(morpholin-4-ylmethyl)-1,3,4-oxadiazole-2(3H)-thione
aX-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia, bDepartment of Studies in Chemistry, Mangalore University, Mangalagangotri 574 199, India, and cDepartment of Chemistry, P. A. College of Engineering, Nadupadavu, Mangalore 574 153, India
*Correspondence e-mail: hkfun@usm.my
In the title compound, C25H21F2N3O3S, the morpholine ring adopts a chair conformation. The 1,3,4-oxadiazole-2(3H)-thione group makes dihedral angles of 78.69 (8), 53.56 (7) and 55.30 (9)° with the benzene rings. In the crystal, O—H⋯O, C—H⋯S and C—H⋯F hydrogen bonds linked the molecules into layers lying parallel to the ab plane. Weak C—H⋯π interactions also occur.
Related literature
For pharmacological background, see: Bhatia & Gupta (2011); Liu (2006). For ring conformations, see: Cremer & Pople (1975). For bond-length data, see: Allen et al. (1987).
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/S1600536811048471/hb6502sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536811048471/hb6502Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536811048471/hb6502Isup3.cml
To a solution of 5-(4,4''-difluoro-5'-hydroxy-1,1':3',1''-terphenyl-4'-yl) -1,3,4-oxadiazole-2(3H)-thione (3.82 g, 0.01 mol) in ethanol (5 ml) was added formaldehyde (0.5 ml, 37%) and morpholine (0.01 mol). The reaction mixture was stirred overnight. After cooling, the precipitate was filtered and crystallized from ethanol. Colourless blocks of (I) were grown from 1:1 mixture of ethanol and DMF by slow evaporation and the yield was 72%. M.p.: 475 K.
H1O3 atom attached to the O atom was located from the difference map and refined freely, [O–H = 0.78 (3) Å]. The remaining H atoms were positioned geometrically [C–H = 0.93 or 0.97 Å] and refined using a riding model with Uiso(H) = 1.2 Ueq(C).
Substituted 1,3,4-oxadiazoles are of considerable pharmaceutical interest. For a recent review, see: Bhatia & Gupta (2011). Polysubstituted aromatics such as terphenyls exhibit considerable biological properties, e.g., potent anticoagulant, immunosuppressants, antithrombotic, neuroprotective, specific 5-lipoxygenase inhibitory and cytotoxic activities (Liu, 2006). Encouraged by these diverse biological activities of 1,3,4-oxadiazoles and terphenyls, our research group has decided to prepare terphenyl derivative bearing the oxadiazole moiety, thus bringing both types of functional groups together in a single molecule: we now report the synthesis and structure of the title compound, (I). The precursor of the title compound was prepared from 4,4'-difluorochalcone by several steps.
The molecular structure is shown in Fig. 1. The morpholine ring adopts a chair conformation with puckering parameters Q= 0.579 (2) Å, Θ= 2.9 (2)° and φ= 247 (5)° (Cremer & Pople, 1975). The 1,3,4-oxadiazole-2(3H)-thione (S1/C20/O1/C19/N1/N2) group makes dihedral angles of 78.69 (8), 53.56 (7) and 55.30 (9) ° with the benzene (C1–C6, C7–C12 & C13–C18) rings, respectively. Bond lengths (Allen et al., 1987) and angles are within normal ranges.
The crystal packing is shown in Fig. 2. Intermolecular O3—H1O3···O2, C5—H5A···S1, C12—H12A···F1 and C23—H23A···F1 hydrogen bonds (Table 1) linked the molecules into layers parallel to ab plane. C—H···π interactions (Table 1) which involves C1 and phenyl ring (Cg1 = C7–C12) further stabilize the crystal structure.
For pharmacological background, see: Bhatia & Gupta (2011); Liu (2006). For ring conformations, see: Cremer & Pople (1975). For bond-length data, see: Allen et al. (1987).
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).Fig. 1. The molecular structure of the title compound with 30% probability displacement ellipsoids. | |
Fig. 2. The crystal packing of the title compound. Dashed lines represent the hydrogen bonds. Hydrogen atoms not involved in hydrogen bonding have been omitted for the sake of clarity. |
C25H21F2N3O3S | F(000) = 2000 |
Mr = 481.51 | Dx = 1.380 Mg m−3 |
Monoclinic, C2/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -C 2yc | Cell parameters from 6002 reflections |
a = 16.0547 (14) Å | θ = 2.3–27.3° |
b = 11.4125 (11) Å | µ = 0.19 mm−1 |
c = 25.364 (2) Å | T = 296 K |
β = 94.202 (2)° | Block, colourless |
V = 4634.9 (7) Å3 | 0.48 × 0.25 × 0.17 mm |
Z = 8 |
Bruker SMART APEXII DUO CCD area-detector diffractometer | 6182 independent reflections |
Radiation source: fine-focus sealed tube | 4139 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.029 |
φ and ω scans | θmax = 29.1°, θmin = 1.6° |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | h = −20→21 |
Tmin = 0.916, Tmax = 0.969 | k = −15→14 |
23057 measured reflections | l = −34→34 |
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)] = 0.044 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.143 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.03 | w = 1/[σ2(Fo2) + (0.0688P)2 + 1.531P] where P = (Fo2 + 2Fc2)/3 |
6182 reflections | (Δ/σ)max < 0.001 |
311 parameters | Δρmax = 0.24 e Å−3 |
0 restraints | Δρmin = −0.24 e Å−3 |
C25H21F2N3O3S | V = 4634.9 (7) Å3 |
Mr = 481.51 | Z = 8 |
Monoclinic, C2/c | Mo Kα radiation |
a = 16.0547 (14) Å | µ = 0.19 mm−1 |
b = 11.4125 (11) Å | T = 296 K |
c = 25.364 (2) Å | 0.48 × 0.25 × 0.17 mm |
β = 94.202 (2)° |
Bruker SMART APEXII DUO CCD area-detector diffractometer | 6182 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | 4139 reflections with I > 2σ(I) |
Tmin = 0.916, Tmax = 0.969 | Rint = 0.029 |
23057 measured reflections |
R[F2 > 2σ(F2)] = 0.044 | 0 restraints |
wR(F2) = 0.143 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.03 | Δρmax = 0.24 e Å−3 |
6182 reflections | Δρmin = −0.24 e Å−3 |
311 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 | ||
S1 | 0.15583 (3) | 0.82030 (5) | 0.44595 (2) | 0.06259 (17) | |
F1 | 0.77333 (9) | 0.33903 (13) | 0.20221 (6) | 0.0943 (5) | |
F2 | 0.46943 (11) | 1.25156 (10) | 0.31200 (6) | 0.1043 (5) | |
O1 | 0.29532 (7) | 0.74319 (10) | 0.40602 (4) | 0.0469 (3) | |
O2 | 0.38526 (11) | 1.29292 (12) | 0.42547 (7) | 0.0812 (5) | |
O3 | 0.39200 (10) | 0.53070 (12) | 0.41580 (6) | 0.0697 (5) | |
N1 | 0.39553 (9) | 0.85596 (11) | 0.44436 (5) | 0.0439 (3) | |
N2 | 0.31768 (8) | 0.88887 (11) | 0.45963 (5) | 0.0420 (3) | |
N3 | 0.32987 (9) | 1.09806 (11) | 0.48147 (6) | 0.0462 (3) | |
C1 | 0.64272 (12) | 0.56922 (18) | 0.24724 (7) | 0.0583 (5) | |
H1A | 0.6243 | 0.6433 | 0.2366 | 0.070* | |
C2 | 0.69619 (13) | 0.5084 (2) | 0.21659 (8) | 0.0673 (6) | |
H2A | 0.7141 | 0.5411 | 0.1858 | 0.081* | |
C3 | 0.72171 (12) | 0.4003 (2) | 0.23261 (8) | 0.0616 (5) | |
C4 | 0.69747 (13) | 0.34894 (18) | 0.27745 (9) | 0.0635 (5) | |
H4A | 0.7161 | 0.2744 | 0.2873 | 0.076* | |
C5 | 0.64462 (12) | 0.41028 (16) | 0.30795 (8) | 0.0569 (5) | |
H5A | 0.6277 | 0.3764 | 0.3388 | 0.068* | |
C6 | 0.61605 (10) | 0.52180 (14) | 0.29362 (6) | 0.0456 (4) | |
C7 | 0.55723 (10) | 0.58586 (14) | 0.32581 (6) | 0.0451 (4) | |
C8 | 0.50339 (11) | 0.52572 (14) | 0.35719 (7) | 0.0504 (4) | |
H8A | 0.5062 | 0.4445 | 0.3594 | 0.061* | |
C9 | 0.44575 (11) | 0.58574 (14) | 0.38513 (7) | 0.0498 (4) | |
C10 | 0.43949 (10) | 0.70772 (13) | 0.38186 (6) | 0.0432 (4) | |
C11 | 0.49340 (10) | 0.76946 (13) | 0.35017 (6) | 0.0428 (4) | |
C12 | 0.55155 (11) | 0.70777 (14) | 0.32334 (7) | 0.0473 (4) | |
H12A | 0.5878 | 0.7488 | 0.3031 | 0.057* | |
C13 | 0.48645 (11) | 0.89862 (13) | 0.34198 (6) | 0.0442 (4) | |
C14 | 0.41390 (13) | 0.94776 (16) | 0.31948 (8) | 0.0605 (5) | |
H14A | 0.3680 | 0.8998 | 0.3111 | 0.073* | |
C15 | 0.40759 (16) | 1.06664 (18) | 0.30901 (9) | 0.0715 (6) | |
H15A | 0.3585 | 1.0987 | 0.2935 | 0.086* | |
C16 | 0.47502 (17) | 1.13499 (16) | 0.32200 (9) | 0.0669 (6) | |
C17 | 0.54758 (16) | 1.09168 (18) | 0.34457 (10) | 0.0725 (6) | |
H17A | 0.5925 | 1.1412 | 0.3533 | 0.087* | |
C18 | 0.55406 (13) | 0.97158 (16) | 0.35447 (8) | 0.0591 (5) | |
H18A | 0.6038 | 0.9405 | 0.3695 | 0.071* | |
C19 | 0.37959 (10) | 0.77082 (13) | 0.41218 (6) | 0.0410 (3) | |
C20 | 0.25662 (11) | 0.82095 (14) | 0.43819 (6) | 0.0434 (4) | |
C21 | 0.30977 (12) | 0.98278 (14) | 0.49890 (7) | 0.0497 (4) | |
H21A | 0.2528 | 0.9833 | 0.5093 | 0.060* | |
H21B | 0.3460 | 0.9643 | 0.5301 | 0.060* | |
C22 | 0.28404 (13) | 1.13579 (17) | 0.43316 (8) | 0.0602 (5) | |
H22A | 0.2249 | 1.1204 | 0.4352 | 0.072* | |
H22B | 0.3030 | 1.0927 | 0.4033 | 0.072* | |
C23 | 0.29823 (15) | 1.26587 (18) | 0.42564 (9) | 0.0719 (6) | |
H23A | 0.2698 | 1.2908 | 0.3925 | 0.086* | |
H23B | 0.2744 | 1.3088 | 0.4539 | 0.086* | |
C24 | 0.42904 (15) | 1.25413 (18) | 0.47370 (12) | 0.0814 (7) | |
H24A | 0.4074 | 1.2946 | 0.5034 | 0.098* | |
H24B | 0.4879 | 1.2729 | 0.4731 | 0.098* | |
C25 | 0.41867 (12) | 1.12362 (16) | 0.48025 (10) | 0.0644 (5) | |
H25A | 0.4414 | 1.0825 | 0.4510 | 0.077* | |
H25B | 0.4484 | 1.0978 | 0.5129 | 0.077* | |
H1O3 | 0.3975 (15) | 0.462 (2) | 0.4167 (10) | 0.085 (8)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0450 (3) | 0.0795 (4) | 0.0650 (3) | −0.0045 (2) | 0.0151 (2) | 0.0078 (2) |
F1 | 0.0814 (9) | 0.1175 (12) | 0.0876 (9) | 0.0413 (8) | 0.0312 (7) | −0.0178 (8) |
F2 | 0.1615 (16) | 0.0372 (6) | 0.1162 (11) | −0.0069 (7) | 0.0247 (11) | 0.0151 (7) |
O1 | 0.0495 (7) | 0.0439 (6) | 0.0489 (6) | −0.0027 (5) | 0.0138 (5) | −0.0051 (5) |
O2 | 0.0963 (12) | 0.0428 (7) | 0.1116 (12) | 0.0026 (7) | 0.0566 (10) | 0.0151 (8) |
O3 | 0.0916 (11) | 0.0357 (7) | 0.0894 (10) | −0.0003 (7) | 0.0576 (9) | 0.0079 (6) |
N1 | 0.0444 (7) | 0.0367 (7) | 0.0522 (7) | −0.0046 (5) | 0.0149 (6) | −0.0034 (6) |
N2 | 0.0448 (8) | 0.0333 (6) | 0.0500 (7) | −0.0026 (5) | 0.0170 (6) | −0.0023 (5) |
N3 | 0.0476 (8) | 0.0344 (7) | 0.0585 (8) | 0.0001 (6) | 0.0167 (6) | −0.0009 (6) |
C1 | 0.0570 (11) | 0.0596 (11) | 0.0609 (10) | 0.0109 (9) | 0.0209 (9) | 0.0060 (9) |
C2 | 0.0602 (13) | 0.0873 (15) | 0.0574 (10) | 0.0148 (11) | 0.0241 (9) | 0.0043 (10) |
C3 | 0.0450 (10) | 0.0789 (14) | 0.0621 (11) | 0.0153 (9) | 0.0114 (8) | −0.0157 (10) |
C4 | 0.0587 (12) | 0.0581 (11) | 0.0748 (13) | 0.0153 (9) | 0.0117 (10) | −0.0077 (10) |
C5 | 0.0599 (11) | 0.0527 (10) | 0.0597 (10) | 0.0059 (8) | 0.0163 (9) | 0.0002 (8) |
C6 | 0.0416 (9) | 0.0453 (9) | 0.0509 (8) | 0.0004 (7) | 0.0105 (7) | −0.0044 (7) |
C7 | 0.0450 (9) | 0.0416 (8) | 0.0501 (8) | −0.0016 (7) | 0.0129 (7) | −0.0034 (7) |
C8 | 0.0615 (11) | 0.0322 (8) | 0.0603 (10) | 0.0012 (7) | 0.0230 (8) | 0.0000 (7) |
C9 | 0.0603 (11) | 0.0364 (8) | 0.0557 (9) | −0.0037 (7) | 0.0249 (8) | 0.0004 (7) |
C10 | 0.0481 (9) | 0.0341 (8) | 0.0492 (8) | −0.0036 (6) | 0.0165 (7) | −0.0048 (6) |
C11 | 0.0440 (9) | 0.0343 (8) | 0.0513 (8) | −0.0074 (6) | 0.0123 (7) | −0.0036 (6) |
C12 | 0.0454 (9) | 0.0416 (8) | 0.0569 (9) | −0.0088 (7) | 0.0179 (8) | −0.0020 (7) |
C13 | 0.0510 (10) | 0.0348 (8) | 0.0488 (8) | −0.0092 (7) | 0.0174 (7) | −0.0038 (6) |
C14 | 0.0619 (12) | 0.0458 (10) | 0.0732 (12) | −0.0109 (9) | 0.0013 (10) | 0.0040 (9) |
C15 | 0.0857 (16) | 0.0513 (11) | 0.0769 (13) | 0.0032 (11) | 0.0012 (12) | 0.0133 (10) |
C16 | 0.0993 (17) | 0.0350 (9) | 0.0689 (12) | −0.0083 (10) | 0.0234 (12) | 0.0032 (8) |
C17 | 0.0840 (16) | 0.0447 (11) | 0.0906 (15) | −0.0277 (11) | 0.0186 (13) | −0.0078 (10) |
C18 | 0.0573 (11) | 0.0458 (10) | 0.0753 (12) | −0.0151 (8) | 0.0122 (9) | −0.0045 (9) |
C19 | 0.0456 (9) | 0.0325 (7) | 0.0464 (8) | −0.0056 (6) | 0.0137 (7) | 0.0005 (6) |
C20 | 0.0472 (9) | 0.0408 (8) | 0.0434 (8) | −0.0030 (7) | 0.0127 (7) | 0.0057 (6) |
C21 | 0.0621 (11) | 0.0389 (8) | 0.0509 (9) | −0.0035 (7) | 0.0232 (8) | −0.0050 (7) |
C22 | 0.0640 (12) | 0.0498 (10) | 0.0677 (12) | 0.0024 (9) | 0.0110 (10) | 0.0033 (9) |
C23 | 0.0871 (16) | 0.0531 (11) | 0.0778 (13) | 0.0152 (11) | 0.0208 (12) | 0.0155 (10) |
C24 | 0.0629 (13) | 0.0455 (11) | 0.139 (2) | −0.0091 (9) | 0.0271 (15) | 0.0061 (13) |
C25 | 0.0505 (11) | 0.0415 (10) | 0.1024 (16) | −0.0016 (8) | 0.0153 (10) | 0.0027 (10) |
S1—C20 | 1.6445 (17) | C8—H8A | 0.9300 |
F1—C3 | 1.365 (2) | C9—C10 | 1.398 (2) |
F2—C16 | 1.356 (2) | C10—C11 | 1.412 (2) |
O1—C20 | 1.3834 (18) | C10—C19 | 1.464 (2) |
O1—C19 | 1.3868 (19) | C11—C12 | 1.387 (2) |
O2—C23 | 1.431 (3) | C11—C13 | 1.492 (2) |
O2—C24 | 1.436 (3) | C12—H12A | 0.9300 |
O3—C9 | 1.3577 (18) | C13—C14 | 1.378 (3) |
O3—H1O3 | 0.78 (3) | C13—C18 | 1.386 (2) |
N1—C19 | 1.283 (2) | C14—C15 | 1.385 (3) |
N1—N2 | 1.3871 (18) | C14—H14A | 0.9300 |
N2—C20 | 1.334 (2) | C15—C16 | 1.355 (3) |
N2—C21 | 1.4749 (19) | C15—H15A | 0.9300 |
N3—C21 | 1.432 (2) | C16—C17 | 1.353 (3) |
N3—C22 | 1.448 (3) | C17—C18 | 1.396 (3) |
N3—C25 | 1.458 (2) | C17—H17A | 0.9300 |
C1—C2 | 1.386 (2) | C18—H18A | 0.9300 |
C1—C6 | 1.391 (2) | C21—H21A | 0.9700 |
C1—H1A | 0.9300 | C21—H21B | 0.9700 |
C2—C3 | 1.353 (3) | C22—C23 | 1.516 (3) |
C2—H2A | 0.9300 | C22—H22A | 0.9700 |
C3—C4 | 1.362 (3) | C22—H22B | 0.9700 |
C4—C5 | 1.380 (2) | C23—H23A | 0.9700 |
C4—H4A | 0.9300 | C23—H23B | 0.9700 |
C5—C6 | 1.392 (2) | C24—C25 | 1.509 (3) |
C5—H5A | 0.9300 | C24—H24A | 0.9700 |
C6—C7 | 1.485 (2) | C24—H24B | 0.9700 |
C7—C12 | 1.395 (2) | C25—H25A | 0.9700 |
C7—C8 | 1.397 (2) | C25—H25B | 0.9700 |
C8—C9 | 1.387 (2) | ||
C20—O1—C19 | 105.32 (12) | C13—C14—H14A | 119.1 |
C23—O2—C24 | 110.36 (15) | C15—C14—H14A | 119.1 |
C9—O3—H1O3 | 113.7 (18) | C16—C15—C14 | 118.1 (2) |
C19—N1—N2 | 103.95 (13) | C16—C15—H15A | 120.9 |
C20—N2—N1 | 112.27 (12) | C14—C15—H15A | 120.9 |
C20—N2—C21 | 126.91 (14) | C17—C16—C15 | 122.69 (18) |
N1—N2—C21 | 120.62 (13) | C17—C16—F2 | 118.7 (2) |
C21—N3—C22 | 114.98 (15) | C15—C16—F2 | 118.6 (2) |
C21—N3—C25 | 115.67 (14) | C16—C17—C18 | 119.03 (19) |
C22—N3—C25 | 111.09 (15) | C16—C17—H17A | 120.5 |
C2—C1—C6 | 121.44 (18) | C18—C17—H17A | 120.5 |
C2—C1—H1A | 119.3 | C13—C18—C17 | 120.1 (2) |
C6—C1—H1A | 119.3 | C13—C18—H18A | 119.9 |
C3—C2—C1 | 118.32 (18) | C17—C18—H18A | 119.9 |
C3—C2—H2A | 120.8 | N1—C19—O1 | 113.05 (13) |
C1—C2—H2A | 120.8 | N1—C19—C10 | 126.79 (15) |
C2—C3—C4 | 123.01 (17) | O1—C19—C10 | 120.12 (13) |
C2—C3—F1 | 118.72 (18) | N2—C20—O1 | 105.36 (13) |
C4—C3—F1 | 118.27 (19) | N2—C20—S1 | 130.84 (12) |
C3—C4—C5 | 118.36 (19) | O1—C20—S1 | 123.79 (12) |
C3—C4—H4A | 120.8 | N3—C21—N2 | 115.25 (13) |
C5—C4—H4A | 120.8 | N3—C21—H21A | 108.5 |
C4—C5—C6 | 121.45 (17) | N2—C21—H21A | 108.5 |
C4—C5—H5A | 119.3 | N3—C21—H21B | 108.5 |
C6—C5—H5A | 119.3 | N2—C21—H21B | 108.5 |
C1—C6—C5 | 117.43 (15) | H21A—C21—H21B | 107.5 |
C1—C6—C7 | 121.40 (15) | N3—C22—C23 | 109.02 (18) |
C5—C6—C7 | 121.14 (15) | N3—C22—H22A | 109.9 |
C12—C7—C8 | 118.31 (14) | C23—C22—H22A | 109.9 |
C12—C7—C6 | 120.54 (14) | N3—C22—H22B | 109.9 |
C8—C7—C6 | 121.07 (14) | C23—C22—H22B | 109.9 |
C9—C8—C7 | 120.80 (15) | H22A—C22—H22B | 108.3 |
C9—C8—H8A | 119.6 | O2—C23—C22 | 111.55 (16) |
C7—C8—H8A | 119.6 | O2—C23—H23A | 109.3 |
O3—C9—C8 | 122.70 (15) | C22—C23—H23A | 109.3 |
O3—C9—C10 | 116.67 (14) | O2—C23—H23B | 109.3 |
C8—C9—C10 | 120.62 (14) | C22—C23—H23B | 109.3 |
C9—C10—C11 | 119.10 (14) | H23A—C23—H23B | 108.0 |
C9—C10—C19 | 120.39 (13) | O2—C24—C25 | 110.3 (2) |
C11—C10—C19 | 120.48 (14) | O2—C24—H24A | 109.6 |
C12—C11—C10 | 119.26 (14) | C25—C24—H24A | 109.6 |
C12—C11—C13 | 118.65 (13) | O2—C24—H24B | 109.6 |
C10—C11—C13 | 121.99 (13) | C25—C24—H24B | 109.6 |
C11—C12—C7 | 121.89 (14) | H24A—C24—H24B | 108.1 |
C11—C12—H12A | 119.1 | N3—C25—C24 | 108.40 (16) |
C7—C12—H12A | 119.1 | N3—C25—H25A | 110.0 |
C14—C13—C18 | 118.30 (16) | C24—C25—H25A | 110.0 |
C14—C13—C11 | 120.80 (15) | N3—C25—H25B | 110.0 |
C18—C13—C11 | 120.83 (17) | C24—C25—H25B | 110.0 |
C13—C14—C15 | 121.73 (19) | H25A—C25—H25B | 108.4 |
C19—N1—N2—C20 | 2.31 (17) | C18—C13—C14—C15 | 0.4 (3) |
C19—N1—N2—C21 | 177.47 (14) | C11—C13—C14—C15 | −176.60 (18) |
C6—C1—C2—C3 | 0.5 (3) | C13—C14—C15—C16 | −0.6 (3) |
C1—C2—C3—C4 | −0.2 (3) | C14—C15—C16—C17 | 0.1 (3) |
C1—C2—C3—F1 | 178.97 (19) | C14—C15—C16—F2 | −179.89 (19) |
C2—C3—C4—C5 | −0.2 (3) | C15—C16—C17—C18 | 0.7 (3) |
F1—C3—C4—C5 | −179.36 (19) | F2—C16—C17—C18 | −179.34 (19) |
C3—C4—C5—C6 | 0.2 (3) | C14—C13—C18—C17 | 0.4 (3) |
C2—C1—C6—C5 | −0.5 (3) | C11—C13—C18—C17 | 177.39 (17) |
C2—C1—C6—C7 | −178.59 (18) | C16—C17—C18—C13 | −0.9 (3) |
C4—C5—C6—C1 | 0.1 (3) | N2—N1—C19—O1 | −1.38 (17) |
C4—C5—C6—C7 | 178.19 (18) | N2—N1—C19—C10 | 176.19 (14) |
C1—C6—C7—C12 | −24.7 (3) | C20—O1—C19—N1 | 0.08 (17) |
C5—C6—C7—C12 | 157.23 (18) | C20—O1—C19—C10 | −177.68 (13) |
C1—C6—C7—C8 | 152.03 (18) | C9—C10—C19—N1 | 125.76 (19) |
C5—C6—C7—C8 | −26.0 (3) | C11—C10—C19—N1 | −52.3 (2) |
C12—C7—C8—C9 | 0.0 (3) | C9—C10—C19—O1 | −56.8 (2) |
C6—C7—C8—C9 | −176.80 (17) | C11—C10—C19—O1 | 125.07 (16) |
C7—C8—C9—O3 | 179.61 (18) | N1—N2—C20—O1 | −2.28 (16) |
C7—C8—C9—C10 | 0.9 (3) | C21—N2—C20—O1 | −177.07 (14) |
O3—C9—C10—C11 | −179.50 (17) | N1—N2—C20—S1 | 176.89 (12) |
C8—C9—C10—C11 | −0.8 (3) | C21—N2—C20—S1 | 2.1 (2) |
O3—C9—C10—C19 | 2.4 (3) | C19—O1—C20—N2 | 1.33 (15) |
C8—C9—C10—C19 | −178.88 (17) | C19—O1—C20—S1 | −177.92 (12) |
C9—C10—C11—C12 | −0.4 (3) | C22—N3—C21—N2 | 54.9 (2) |
C19—C10—C11—C12 | 177.73 (16) | C25—N3—C21—N2 | −76.8 (2) |
C9—C10—C11—C13 | 175.85 (17) | C20—N2—C21—N3 | −116.90 (18) |
C19—C10—C11—C13 | −6.0 (3) | N1—N2—C21—N3 | 68.7 (2) |
C10—C11—C12—C7 | 1.4 (3) | C21—N3—C22—C23 | 168.57 (15) |
C13—C11—C12—C7 | −174.96 (17) | C25—N3—C22—C23 | −57.65 (19) |
C8—C7—C12—C11 | −1.2 (3) | C24—O2—C23—C22 | −57.5 (2) |
C6—C7—C12—C11 | 175.63 (16) | N3—C22—C23—O2 | 56.2 (2) |
C12—C11—C13—C14 | 116.54 (19) | C23—O2—C24—C25 | 59.3 (2) |
C10—C11—C13—C14 | −59.7 (2) | C21—N3—C25—C24 | −166.88 (18) |
C12—C11—C13—C18 | −60.4 (2) | C22—N3—C25—C24 | 59.7 (2) |
C10—C11—C13—C18 | 123.36 (18) | O2—C24—C25—N3 | −59.7 (2) |
Cg1 is the centroid of the C7–C12 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
O3—H1O3···O2i | 0.79 (2) | 1.95 (2) | 2.728 (2) | 167 (2) |
C5—H5A···S1ii | 0.93 | 2.80 | 3.639 (2) | 151 |
C12—H12A···F1iii | 0.93 | 2.47 | 3.292 (2) | 148 |
C23—H23A···F1iv | 0.97 | 2.51 | 3.462 (3) | 167 |
C1—H1A···Cg1v | 0.93 | 2.91 | 3.414 (2) | 115 |
Symmetry codes: (i) x, y−1, z; (ii) x+1/2, y−1/2, z; (iii) −x+3/2, y+1/2, −z+1/2; (iv) −x+1, y+1, −z+1/2; (v) −x+1, y, −z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C25H21F2N3O3S |
Mr | 481.51 |
Crystal system, space group | Monoclinic, C2/c |
Temperature (K) | 296 |
a, b, c (Å) | 16.0547 (14), 11.4125 (11), 25.364 (2) |
β (°) | 94.202 (2) |
V (Å3) | 4634.9 (7) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 0.19 |
Crystal size (mm) | 0.48 × 0.25 × 0.17 |
Data collection | |
Diffractometer | Bruker SMART APEXII DUO CCD area-detector |
Absorption correction | Multi-scan (SADABS; Bruker, 2009) |
Tmin, Tmax | 0.916, 0.969 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 23057, 6182, 4139 |
Rint | 0.029 |
(sin θ/λ)max (Å−1) | 0.684 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.044, 0.143, 1.03 |
No. of reflections | 6182 |
No. of parameters | 311 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.24, −0.24 |
Computer programs: APEX2 (Bruker, 2009), SAINT (Bruker, 2009), SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).
Cg1 is the centroid of the C7–C12 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
O3—H1O3···O2i | 0.79 (2) | 1.95 (2) | 2.728 (2) | 167 (2) |
C5—H5A···S1ii | 0.93 | 2.80 | 3.639 (2) | 151 |
C12—H12A···F1iii | 0.93 | 2.47 | 3.292 (2) | 148 |
C23—H23A···F1iv | 0.97 | 2.51 | 3.462 (3) | 167 |
C1—H1A···Cg1v | 0.93 | 2.91 | 3.414 (2) | 115 |
Symmetry codes: (i) x, y−1, z; (ii) x+1/2, y−1/2, z; (iii) −x+3/2, y+1/2, −z+1/2; (iv) −x+1, y+1, −z+1/2; (v) −x+1, y, −z+1/2. |
Footnotes
‡Thomson Reuters ResearcherID: A-3561-2009.
Acknowledgements
HKF and SA thank Universiti Sains Malaysia (USM) for the Research University Grant (1001/PFIZIK/811160). SA thanks the Malaysian Government and USM for the Academic Staff Training Scheme (ASTS) award. BN thanks the UGC for financial assistance through an SAP and BSR one-time grant for the purchase of chemicals. SS thanks Mangalore University for research facilities.
References
Allen, F. H., Kennard, O., Watson, D. G., Brammer, L., Orpen, A. G. & Taylor, R. (1987). J. Chem. Soc. Perkin Trans. 2, pp. S1–19. CSD CrossRef Web of Science Google Scholar
Bhatia, S. & Gupta, M. (2011). J. Chem. Pharm. Res. 3, 137–147. CAS Google Scholar
Bruker (2009). SADABS, APEX2 and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Cremer, D. & Pople, J. A. (1975). J. Am. Chem. Soc. 97, 1354–1358. CrossRef CAS Web of Science Google Scholar
Liu, J. K. (2006). Chem. Rev., 106, 2209–2223. Web of Science CrossRef PubMed CAS Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
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Substituted 1,3,4-oxadiazoles are of considerable pharmaceutical interest. For a recent review, see: Bhatia & Gupta (2011). Polysubstituted aromatics such as terphenyls exhibit considerable biological properties, e.g., potent anticoagulant, immunosuppressants, antithrombotic, neuroprotective, specific 5-lipoxygenase inhibitory and cytotoxic activities (Liu, 2006). Encouraged by these diverse biological activities of 1,3,4-oxadiazoles and terphenyls, our research group has decided to prepare terphenyl derivative bearing the oxadiazole moiety, thus bringing both types of functional groups together in a single molecule: we now report the synthesis and structure of the title compound, (I). The precursor of the title compound was prepared from 4,4'-difluorochalcone by several steps.
The molecular structure is shown in Fig. 1. The morpholine ring adopts a chair conformation with puckering parameters Q= 0.579 (2) Å, Θ= 2.9 (2)° and φ= 247 (5)° (Cremer & Pople, 1975). The 1,3,4-oxadiazole-2(3H)-thione (S1/C20/O1/C19/N1/N2) group makes dihedral angles of 78.69 (8), 53.56 (7) and 55.30 (9) ° with the benzene (C1–C6, C7–C12 & C13–C18) rings, respectively. Bond lengths (Allen et al., 1987) and angles are within normal ranges.
The crystal packing is shown in Fig. 2. Intermolecular O3—H1O3···O2, C5—H5A···S1, C12—H12A···F1 and C23—H23A···F1 hydrogen bonds (Table 1) linked the molecules into layers parallel to ab plane. C—H···π interactions (Table 1) which involves C1 and phenyl ring (Cg1 = C7–C12) further stabilize the crystal structure.