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2-[4-Acetyl-5-(bi­phenyl-4-yl)-4,5-di­hydro-1,3,4-oxa­diazol-2-yl]phenyl acetate

aDepartment of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
*Correspondence e-mail: seikweng@um.edu.my

(Received 11 March 2010; accepted 14 March 2010; online 20 March 2010)

In the title mol­ecule, C24H20N2O4, the five-membered oxadiazole ring is nearly planar (r.m.s. deviation = 0.053 Å) and the phenyl ring of the biphenyl unit attached to it forms a dihedral angle of 73.2 (1)°; the other phenyl ring is close to coplanar with the oxadiazole ring [dihedral angle = 6.2 (2)°].

Related literature

For the crystal structures of other 2,3-dihydro-1,3,4-oxa­diazo­les, see: Jin et al. (2006[Jin, L.-H., Chen, J., Song, B.-A., Chen, Z., Yang, S., Li, Q.-Z., Hu, D.-Y. & Xu, R.-Q. (2006). Bioorg. Med. Chem. Lett. 16, 5036-5041.]); Somogyi et al. (1992[Somogyi, L., Czugler, M. & Sohar, P. (1992). Tetrahedron, 48, 9355-9362.]); Song et al. (2006[Song, Q.-B., Zhang, J. & Tiekink, E. R. T. (2006). Acta Cryst. E62, o4115-o4117.]); He & Zhu (2008[He, D.-H. & Zhu, Y.-C. (2008). Acta Cryst. E64, o1443.]).

[Scheme 1]

Experimental

Crystal data
  • C24H20N2O4

  • Mr = 400.42

  • Orthorhombic, P 21 21 21

  • a = 8.6750 (11) Å

  • b = 12.0279 (14) Å

  • c = 19.221 (2) Å

  • V = 2005.6 (4) Å3

  • Z = 4

  • Mo Kα radiation

  • μ = 0.09 mm−1

  • T = 293 K

  • 0.30 × 0.20 × 0.10 mm

Data collection
  • Bruker SMART APEX diffractometer

  • 16090 measured reflections

  • 2029 independent reflections

  • 1534 reflections with I > 2σ(I)

  • Rint = 0.056

Refinement
  • R[F2 > 2σ(F2)] = 0.035

  • wR(F2) = 0.100

  • S = 1.00

  • 2029 reflections

  • 274 parameters

  • H-atom parameters constrained

  • Δρmax = 0.11 e Å−3

  • Δρmin = −0.13 e Å−3

Data collection: APEX2 (Bruker, 2009[Bruker (2009). APEX2 and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.]); cell refinement: SAINT (Bruker, 2009[Bruker (2009). APEX2 and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.]); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); molecular graphics: X-SEED (Barbour, 2001[Barbour, L. J. (2001). J. Supramol. Chem. 1, 189-191.]); software used to prepare material for publication: publCIF (Westrip, 2010[Westrip, S. P. (2010). publCIF. In preparation.]).

Supporting information


Comment top

The Schiff base reactant, N'-(4-phenylbenzylidene)-2-hydroxybenzohydrazide, features an –C(=O)–NH–N=CH linkage betwen the two aromatic systems that can be induced to form an oxadiazole. In this study, the oxadiazole is indeed formed when cyclized in acetic anhyride. The nitrogen atom in the 3-position of the ring has also been acetylated; interestingly, the hydroxy group also undergoes acetylation to yield a bis-acetylated product, the title compound. The crystal structure of the title compound is reported in this article (Fig. 1).

Related literature top

For the crystal structures of other 2,3-dihydro-1,3,4-oxadiazoles, see: Jin et al. (2006); Somogyi et al. (1992); Song et al. (2006); He & Zhu (2008).

Experimental top

The Schiff base, N'-(4-phenylbenzylidene)-2-hydroxybenzohydrazide, was synthesized by condensing 4-phenylbenzaldehyde with 2-hydrobenzhydrazide. The compound (0.5 g, 1.58 mmol) was heated in acetic anhydride (5 ml) for 2 h. The solution was cooled and then poured into crushed ice. The solid that separated solid was collected and recrystallized from methanol to give the title compound as well-formed prisms.

Refinement top

The H-atoms were placed in calculated positions (C—H 0.93–98 Å) and were included in the refinement in the riding model approximation, with Uiso(H) set to 1.2–1.5Ueq(C). Due to insufficient anomalous dispersion effects, an absolute configuration could not be established. Therefore, 1495 Friedel pairs were merged.

Computing details top

Data collection: APEX2 (Bruker, 2009); cell refinement: SAINT (Bruker, 2009); data reduction: SAINT (Bruker, 2009); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: X-SEED (Barbour, 2001); software used to prepare material for publication: publCIF (Westrip, 2010).

Figures top
[Figure 1] Fig. 1. Thermal ellipsoid plot (Barbour, 2001) of the title compound; ellipsoids are drawn at the 50% probability level and H atoms are of arbitrary radiuii.
2-[4-Acetyl-5-(biphenyl-4-yl)-4,5-dihydro-1,3,4-oxadiazol-2-yl]phenyl acetate top
Crystal data top
C24H20N2O4F(000) = 840
Mr = 400.42Dx = 1.326 Mg m3
Orthorhombic, P212121Mo Kα radiation, λ = 0.71073 Å
Hall symbol: P 2ac 2abCell parameters from 2292 reflections
a = 8.6750 (11) Åθ = 2.6–19.9°
b = 12.0279 (14) ŵ = 0.09 mm1
c = 19.221 (2) ÅT = 293 K
V = 2005.6 (4) Å3Prism, colorless
Z = 40.30 × 0.20 × 0.10 mm
Data collection top
Bruker SMART APEX
diffractometer
1534 reflections with I > 2σ(I)
Radiation source: fine-focus sealed tubeRint = 0.056
Graphite monochromatorθmax = 25.0°, θmin = 2.0°
ω scansh = 1010
16090 measured reflectionsk = 1414
2029 independent reflectionsl = 2222
Refinement top
Refinement on F2Secondary atom site location: difference Fourier map
Least-squares matrix: fullHydrogen site location: inferred from neighbouring sites
R[F2 > 2σ(F2)] = 0.035H-atom parameters constrained
wR(F2) = 0.100 w = 1/[σ2(Fo2) + (0.0598P)2 + 0.076P]
where P = (Fo2 + 2Fc2)/3
S = 1.00(Δ/σ)max = 0.001
2029 reflectionsΔρmax = 0.11 e Å3
274 parametersΔρmin = 0.13 e Å3
0 restraintsExtinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4
Primary atom site location: structure-invariant direct methodsExtinction coefficient: 0.0082 (18)
Crystal data top
C24H20N2O4V = 2005.6 (4) Å3
Mr = 400.42Z = 4
Orthorhombic, P212121Mo Kα radiation
a = 8.6750 (11) ŵ = 0.09 mm1
b = 12.0279 (14) ÅT = 293 K
c = 19.221 (2) Å0.30 × 0.20 × 0.10 mm
Data collection top
Bruker SMART APEX
diffractometer
1534 reflections with I > 2σ(I)
16090 measured reflectionsRint = 0.056
2029 independent reflections
Refinement top
R[F2 > 2σ(F2)] = 0.0350 restraints
wR(F2) = 0.100H-atom parameters constrained
S = 1.00Δρmax = 0.11 e Å3
2029 reflectionsΔρmin = 0.13 e Å3
274 parameters
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
O10.0208 (3)1.13163 (16)0.16056 (10)0.0571 (6)
O20.1684 (3)1.0247 (2)0.22783 (14)0.0894 (9)
O30.3885 (2)0.96800 (17)0.22120 (10)0.0540 (5)
O40.4949 (3)1.19201 (19)0.37185 (12)0.0706 (7)
N10.2135 (3)1.09315 (19)0.25521 (13)0.0513 (6)
N20.3385 (3)1.09851 (19)0.30133 (13)0.0537 (7)
C10.1667 (5)1.2206 (3)0.2462 (2)0.0806 (11)
H1A0.22211.20600.28840.121*
H1B0.23071.26270.21510.121*
H1C0.07511.26220.25660.121*
C20.1239 (4)1.1146 (3)0.21312 (17)0.0589 (8)
C30.0343 (4)1.0375 (2)0.12550 (15)0.0488 (7)
C40.0388 (4)1.0074 (3)0.06492 (16)0.0618 (9)
H40.12501.04650.04970.074*
C50.0166 (5)0.9191 (3)0.02688 (17)0.0693 (10)
H50.03250.89780.01400.083*
C60.1450 (4)0.8622 (3)0.04945 (17)0.0631 (9)
H60.18210.80240.02380.076*
C70.2189 (4)0.8933 (2)0.10977 (15)0.0534 (8)
H70.30550.85410.12440.064*
C80.1655 (3)0.9829 (2)0.14935 (14)0.0442 (7)
C90.2499 (3)1.0175 (2)0.21116 (15)0.0451 (7)
C100.3703 (4)1.1884 (2)0.34137 (16)0.0550 (8)
C110.2494 (5)1.2753 (3)0.34728 (19)0.0733 (10)
H11A0.29711.34610.35560.110*
H11B0.18181.25760.38520.110*
H11C0.19131.27840.30480.110*
C120.4469 (4)1.0077 (2)0.28773 (15)0.0518 (7)
H120.55211.03630.28270.062*
C130.4419 (3)0.9151 (2)0.34025 (15)0.0443 (7)
C140.3338 (4)0.9088 (3)0.39249 (16)0.0534 (8)
H140.26170.96540.39750.064*
C150.3307 (4)0.8198 (3)0.43733 (16)0.0562 (8)
H150.25700.81770.47240.067*
C160.4350 (3)0.7333 (2)0.43137 (15)0.0463 (7)
C170.5437 (4)0.7399 (3)0.37835 (17)0.0568 (8)
H170.61460.68260.37280.068*
C180.5483 (4)0.8292 (2)0.33416 (16)0.0557 (8)
H180.62340.83250.29970.067*
C190.4308 (3)0.6360 (2)0.47964 (15)0.0486 (7)
C200.4008 (4)0.6501 (3)0.54999 (17)0.0651 (9)
H200.38190.72100.56730.078*
C210.3985 (5)0.5602 (3)0.5946 (2)0.0803 (12)
H210.37950.57080.64180.096*
C220.4242 (5)0.4550 (3)0.5693 (2)0.0804 (12)
H220.41920.39420.59910.096*
C230.4573 (5)0.4395 (3)0.5002 (2)0.0758 (11)
H230.47780.36850.48340.091*
C240.4601 (4)0.5292 (3)0.45577 (18)0.0610 (8)
H240.48190.51810.40890.073*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
O10.0657 (14)0.0503 (12)0.0552 (12)0.0078 (10)0.0035 (11)0.0030 (10)
O20.103 (2)0.0775 (17)0.0877 (18)0.0177 (17)0.0411 (16)0.0123 (16)
O30.0576 (13)0.0552 (12)0.0492 (11)0.0090 (10)0.0011 (10)0.0022 (10)
O40.0828 (18)0.0671 (15)0.0619 (14)0.0174 (13)0.0126 (14)0.0039 (12)
N10.0569 (16)0.0432 (14)0.0538 (15)0.0015 (12)0.0060 (13)0.0069 (13)
N20.0579 (16)0.0417 (13)0.0614 (15)0.0022 (12)0.0096 (14)0.0074 (13)
C10.080 (3)0.080 (3)0.082 (3)0.029 (2)0.003 (2)0.010 (2)
C20.0554 (19)0.067 (2)0.0539 (19)0.0090 (17)0.0042 (17)0.0071 (18)
C30.0570 (18)0.0457 (16)0.0438 (16)0.0027 (15)0.0071 (15)0.0039 (14)
C40.0587 (19)0.077 (2)0.0496 (19)0.0057 (19)0.0016 (17)0.0002 (17)
C50.072 (2)0.088 (3)0.0487 (19)0.020 (2)0.0041 (18)0.0086 (19)
C60.074 (2)0.061 (2)0.055 (2)0.0131 (19)0.0136 (19)0.0187 (17)
C70.0576 (19)0.0507 (18)0.0518 (18)0.0051 (16)0.0093 (16)0.0033 (15)
C80.0528 (16)0.0371 (14)0.0429 (16)0.0075 (13)0.0058 (14)0.0042 (13)
C90.0511 (16)0.0368 (15)0.0474 (17)0.0009 (13)0.0030 (14)0.0021 (14)
C100.077 (2)0.0436 (17)0.0445 (17)0.0122 (17)0.0019 (18)0.0036 (14)
C110.101 (3)0.0514 (19)0.067 (2)0.003 (2)0.000 (2)0.0150 (18)
C120.0507 (16)0.0515 (18)0.0532 (18)0.0041 (15)0.0030 (15)0.0049 (15)
C130.0403 (15)0.0447 (15)0.0480 (16)0.0029 (13)0.0015 (14)0.0043 (14)
C140.0498 (18)0.0476 (18)0.063 (2)0.0096 (15)0.0021 (16)0.0006 (16)
C150.0501 (17)0.0585 (19)0.0600 (19)0.0033 (16)0.0147 (16)0.0026 (17)
C160.0420 (16)0.0461 (16)0.0507 (17)0.0021 (14)0.0002 (15)0.0069 (14)
C170.0542 (18)0.0513 (18)0.0651 (19)0.0118 (16)0.0066 (17)0.0032 (16)
C180.0538 (18)0.0588 (18)0.0546 (18)0.0054 (16)0.0115 (16)0.0020 (16)
C190.0398 (16)0.0527 (18)0.0534 (18)0.0000 (14)0.0006 (14)0.0025 (15)
C200.074 (2)0.061 (2)0.059 (2)0.0033 (18)0.0058 (19)0.0022 (18)
C210.092 (3)0.087 (3)0.062 (2)0.006 (2)0.008 (2)0.012 (2)
C220.081 (3)0.076 (3)0.085 (3)0.007 (2)0.012 (2)0.030 (2)
C230.076 (2)0.057 (2)0.094 (3)0.0040 (19)0.012 (2)0.012 (2)
C240.062 (2)0.0540 (19)0.067 (2)0.0000 (18)0.0093 (18)0.0013 (17)
Geometric parameters (Å, º) top
O1—C21.365 (4)C11—H11B0.9600
O1—C31.401 (3)C11—H11C0.9600
O2—C21.183 (4)C12—C131.503 (4)
O3—C91.356 (4)C12—H120.9800
O3—C121.456 (3)C13—C141.376 (4)
O4—C101.230 (4)C13—C181.390 (4)
N1—C91.283 (3)C14—C151.374 (4)
N1—N21.402 (3)C14—H140.9300
N2—C101.355 (4)C15—C161.384 (4)
N2—C121.465 (4)C15—H150.9300
C1—C21.472 (4)C16—C171.391 (4)
C1—H1A0.9600C16—C191.494 (4)
C1—H1B0.9600C17—C181.370 (4)
C1—H1C0.9600C17—H170.9300
C3—C41.374 (4)C18—H180.9300
C3—C81.392 (4)C19—C201.387 (4)
C4—C51.377 (5)C19—C241.387 (4)
C4—H40.9300C20—C211.381 (5)
C5—C61.377 (5)C20—H200.9300
C5—H50.9300C21—C221.374 (5)
C6—C71.376 (4)C21—H210.9300
C6—H60.9300C22—C231.371 (5)
C7—C81.398 (4)C22—H220.9300
C7—H70.9300C23—C241.377 (5)
C8—C91.456 (4)C23—H230.9300
C10—C111.485 (5)C24—H240.9300
C11—H11A0.9600
C2—O1—C3117.3 (2)H11B—C11—H11C109.5
C9—O3—C12106.9 (2)O3—C12—N2100.2 (2)
C9—N1—N2105.1 (2)O3—C12—C13109.7 (2)
C10—N2—N1123.6 (3)N2—C12—C13114.4 (2)
C10—N2—C12124.4 (3)O3—C12—H12110.7
N1—N2—C12110.4 (2)N2—C12—H12110.7
C2—C1—H1A109.5C13—C12—H12110.7
C2—C1—H1B109.5C14—C13—C18118.2 (3)
H1A—C1—H1B109.5C14—C13—C12123.4 (3)
C2—C1—H1C109.5C18—C13—C12118.3 (3)
H1A—C1—H1C109.5C15—C14—C13120.9 (3)
H1B—C1—H1C109.5C15—C14—H14119.5
O2—C2—O1121.9 (3)C13—C14—H14119.5
O2—C2—C1127.3 (3)C14—C15—C16121.4 (3)
O1—C2—C1110.8 (3)C14—C15—H15119.3
C4—C3—C8122.1 (3)C16—C15—H15119.3
C4—C3—O1117.6 (3)C15—C16—C17117.4 (3)
C8—C3—O1120.1 (3)C15—C16—C19121.5 (3)
C3—C4—C5119.5 (3)C17—C16—C19121.1 (3)
C3—C4—H4120.3C18—C17—C16121.3 (3)
C5—C4—H4120.3C18—C17—H17119.4
C4—C5—C6119.9 (3)C16—C17—H17119.4
C4—C5—H5120.1C17—C18—C13120.7 (3)
C6—C5—H5120.1C17—C18—H18119.6
C7—C6—C5120.5 (3)C13—C18—H18119.6
C7—C6—H6119.8C20—C19—C24118.0 (3)
C5—C6—H6119.8C20—C19—C16120.9 (3)
C6—C7—C8120.9 (3)C24—C19—C16121.0 (3)
C6—C7—H7119.6C21—C20—C19120.8 (3)
C8—C7—H7119.6C21—C20—H20119.6
C3—C8—C7117.1 (3)C19—C20—H20119.6
C3—C8—C9123.0 (3)C22—C21—C20119.9 (3)
C7—C8—C9119.9 (3)C22—C21—H21120.1
N1—C9—O3115.8 (3)C20—C21—H21120.1
N1—C9—C8128.2 (3)C23—C22—C21120.2 (3)
O3—C9—C8115.9 (2)C23—C22—H22119.9
O4—C10—N2118.5 (3)C21—C22—H22119.9
O4—C10—C11124.0 (3)C22—C23—C24119.8 (3)
N2—C10—C11117.5 (3)C22—C23—H23120.1
C10—C11—H11A109.5C24—C23—H23120.1
C10—C11—H11B109.5C23—C24—C19121.1 (3)
H11A—C11—H11B109.5C23—C24—H24119.4
C10—C11—H11C109.5C19—C24—H24119.4
H11A—C11—H11C109.5
C9—N1—N2—C10158.3 (3)C10—N2—C12—O3154.2 (3)
C9—N1—N2—C128.2 (3)N1—N2—C12—O312.1 (3)
C3—O1—C2—O21.7 (4)C10—N2—C12—C1388.5 (3)
C3—O1—C2—C1178.1 (3)N1—N2—C12—C13105.2 (3)
C2—O1—C3—C495.3 (3)O3—C12—C13—C14104.7 (3)
C2—O1—C3—C889.4 (3)N2—C12—C13—C147.0 (4)
C8—C3—C4—C51.4 (5)O3—C12—C13—C1872.7 (3)
O1—C3—C4—C5176.6 (3)N2—C12—C13—C18175.6 (3)
C3—C4—C5—C60.5 (5)C18—C13—C14—C150.1 (4)
C4—C5—C6—C70.2 (5)C12—C13—C14—C15177.3 (3)
C5—C6—C7—C80.0 (5)C13—C14—C15—C160.5 (5)
C4—C3—C8—C71.6 (4)C14—C15—C16—C170.3 (4)
O1—C3—C8—C7176.6 (2)C14—C15—C16—C19179.4 (3)
C4—C3—C8—C9176.3 (3)C15—C16—C17—C180.6 (4)
O1—C3—C8—C91.3 (4)C19—C16—C17—C18179.7 (3)
C6—C7—C8—C30.9 (4)C16—C17—C18—C131.3 (5)
C6—C7—C8—C9177.1 (3)C14—C13—C18—C171.0 (4)
N2—N1—C9—O30.1 (3)C12—C13—C18—C17176.5 (3)
N2—N1—C9—C8175.7 (3)C15—C16—C19—C2039.6 (4)
C12—O3—C9—N17.9 (3)C17—C16—C19—C20140.8 (3)
C12—O3—C9—C8175.8 (2)C15—C16—C19—C24141.8 (3)
C3—C8—C9—N16.3 (4)C17—C16—C19—C2437.8 (4)
C7—C8—C9—N1175.9 (3)C24—C19—C20—C210.7 (5)
C3—C8—C9—O3169.5 (2)C16—C19—C20—C21179.3 (3)
C7—C8—C9—O38.3 (4)C19—C20—C21—C220.8 (6)
N1—N2—C10—O4168.8 (3)C20—C21—C22—C232.2 (7)
C12—N2—C10—O44.3 (4)C21—C22—C23—C242.0 (6)
N1—N2—C10—C1112.9 (4)C22—C23—C24—C190.4 (6)
C12—N2—C10—C11177.4 (3)C20—C19—C24—C230.9 (5)
C9—O3—C12—N211.5 (3)C16—C19—C24—C23179.6 (3)
C9—O3—C12—C13109.3 (3)

Experimental details

Crystal data
Chemical formulaC24H20N2O4
Mr400.42
Crystal system, space groupOrthorhombic, P212121
Temperature (K)293
a, b, c (Å)8.6750 (11), 12.0279 (14), 19.221 (2)
V3)2005.6 (4)
Z4
Radiation typeMo Kα
µ (mm1)0.09
Crystal size (mm)0.30 × 0.20 × 0.10
Data collection
DiffractometerBruker SMART APEX
diffractometer
Absorption correction
No. of measured, independent and
observed [I > 2σ(I)] reflections
16090, 2029, 1534
Rint0.056
(sin θ/λ)max1)0.594
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.035, 0.100, 1.00
No. of reflections2029
No. of parameters274
H-atom treatmentH-atom parameters constrained
Δρmax, Δρmin (e Å3)0.11, 0.13

Computer programs: APEX2 (Bruker, 2009), SAINT (Bruker, 2009), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), X-SEED (Barbour, 2001), publCIF (Westrip, 2010).

 

Acknowledgements

We thank the University of Malaya for supporting this study.

References

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