A series of substituted 1,3,4-oxadiazole derivatives 2a-e and 4a-e have been synthesized from diphenyl acetic acid hydrazide under various reaction conditions. These compounds have been tested in-vivo for their anti-inflammatory and analgesic activities. The compound 2-[(5-diphenylmethyl-1,3,4-oxadiazol-2-yl)sulfanyl]-N-(3-chloro-4-fluro-phenyl)acetamide 4b has emerged as the most active compou...

In the title compound, C28H18N2O5, the dihedral angle between the terminal benzoate rings is 20.67 (12)°. The central oxadiazole ring is almost coplanar with its two benzene ring substituents, making dihedral angles of 4.80 (16) and 5.82 (16)°. In the crystal, pairs of C-H⋯O hydrogen bonds form inversion dimers with R 2 (2)(40) ring motifs. The structure also features C-H⋯O, C-H⋯π and π-π inter...

In this work, some new oxadiazole derivatives have been prepared, by reacting phenyl hydrazine and acetic anhydride together, which furnished 2,4-dimethyl-4-phenyloxadiazole. This product was reacted with a series of aromatic aldehydes, to obtain derivatives. These were characterized TLC, melting points, infrared red, proton nuclear magnetic resonance, carbon thirteen resonance mass spectroscop...

In the title compound, C(20)H(22)N(2)O(5), the central 1,3,4-oxadiazole ring is essentially planar [r.m.s. deviation from the best plane of 0.0011 Å] and makes dihedral angles of 4.10 (3) and 13.32 (4)° with the two benzene rings. In the crystal structure, the packing is stabilized by weak non-classical inter-molecular C-H⋯N hydrogen bonds, which link the mol-ecules into an extended network.

THE ASYMMETRIC UNIT OF THE TITLE COMPOUND [SYSTEMATIC NAME: 4-acetyl-3-(4-meth-oxy-phen-yl)-1,2,3-oxadiazol-3-ium-5-olate], C(11)H(10)N(2)O(4), contains four crystallographically independent mol-ecules. The 1,2,3-oxadiazole rings are almost planar [maximum deviations = 0.006 (3), 0.006 (3), 0.002 (3) and 0.009 (3) Å] and form dihedral angles of 55.03 (14), 61.02 (13), 58.36 (14) and 53.79 (15)°...

In the title compound, C(23)H(20)F(3)N(5)O, the piperazine ring adopts a chair conformation. The quinoline ring makes dihedral angles of 56.61 (11), 49.94 (12) and 42.58 (14)° with the piperazine ring, the 1,3,4-oxadiazole ring and the benzene ring, respectively. An intra-molecular C-H⋯O hydrogen bond generates an S(7) ring motif. In the crystal, mol-ecules are linked into infinite chains along...