In the title compound, C(30)H(32)N(4)O(4)S, the dihedral angles between the central thio-phene ring and the pendant oxadiazole rings are 10.1 (2) and 6.8 (3)°. The dihedral angles between each oxadiazole ring and its adjacent benzene ring are 6.8 (2) and 5.3 (3)°.

Three diazoles namely 5-methyl-1,3,4-oxadiazole -2(3H)-thione, 5-methyl-1,3,4-thiadiazol-2(3H)-thione and 4-amino-5-methyl-2H-1,2,4-triazole-3-thiol were synthesized from acetic acid or ethyl acetate. Seco-acyclo-N-nucleoside analogous was by condensation of 1,3-benzylidine-glyceryl-2-tosylate with the three diazoles. Structural proof based upon IR, 1H-NMR, 13C-NMR spectroscopy MS measurements....

In the title 1,2,4-oxadiazole derivative, C(19)H(18)ClN(3)O(3), the 1,2,4-oxadiazole ring makes dihedral angles of 12.83 (8) and 4.89 (8)°, respectively, with the benzyl and 4-chloro-phenyl rings, while the dihedral angle between the benzyl and 4-chloro-phenyl rings is 11.53 (7)°. In the crystal, mol-ecules are linked by N-H⋯N hydrogen bonds into helical chains along the b axis. A weak C-H⋯π in...

In the title mol-ecule, C(24)H(20)N(2)O(4), 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)°].

In the title sydnone compound, C(20)H(18)ClN(7)O(4)S, the oxadiazole, triazole, chloro-substituted and meth-oxy-substituted phenyl rings are essentially planar, with maximum deviations of 0.007 (3), 0.009 (2), 0.017 (2) and 0.002 (3) Å, respectively. The dihedral angles between the chloro-substituted phenyl ring and the triazole ring, the triazole ring and the oxadiazole ring, and the oxadiazol...

A series of 5-substituted-4-amino-1,2,4-triazole-3-thioesters was synthesized by converting variously substituted organic acids successively into the corresponding esters, hydrazides, 5-substituted-1,3,4-oxadiazole-2-thiols, 5-substituted-1,2,4-triazole-2-thiols and 5-substituted-1,3,4-oxadiazole-2-thioesters. Finally the target compounds were obtained by refluxing 5-substituted-1,3,4-oxadiazol...

In the title compound, C(36)H(44)N(4)O(4)S, the dihedral angles between the central thio-phene ring and the pendent oxadiazole rings are 12.7 (2) and 13.7 (2)°, and the dihedral angles between the oxadiazole rings and their adjacent benzene rings are 6.1 (2) and 17.5 (2)°. An intra-molecular C-H⋯O inter-action may help to establish the conformation.

1,3,4-Oxadizoles form a biologically important group of compounds having activities like analgesic, anti-inflammatory, bactericidal, antifungal, anticonvulsant, psychotropic, plant growth regulating and mono amino oxidase inhibition. This research has focused on the incorporation of the oxadiazole moiety into isoniazid because of their versatile biological action, to get 2-aryl-5-(4-pyridyl)-1,...

The compound, C(32)H(28)N(4)O(5), which was synthesized by the reaction of 2,5-bis-(2-hydroxy-lphen-yl)-1,3,4-oxadiazole with N-benzyl-2-chloro-acetamide, lies on a twofold rotation axis which passes through the mid-point of the N-N bond and the O atom of the oxadiazole unit. The phenyl-ene and oxadiazole rings are almost coplanar [dihedral angle 1.67 (5)°]. The structure is stabilized by intra...

3 Starting from 2-methyl-4-nitro-imidazole, new 5-(2-methyl- 4-nitro-1-imidazomethyl)-1,3,4-oxadiazole-2-thione () was synthesized and was subjected to Mannich reaction with appropriate amines to yield a new series of 3-substituted aminomethyl-5-(2-methyl-4-nitro-1-imidazomethyl)- 1,3,4-oxadiazole-2-thiones (4a-j). The structure of the title compounds was elucidated by elemental analysis and sp...