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Updated: May 3, 2026

Microwave-Assisted Preparation of 1-Aryl-1H-pyrazole-5-amines
Published on: June 23, 2019
5-Methyl-1,3-diphenyl-N-(5-phenyl-1,3,4-thia-diazol-2-yl)-1H-pyrazole-4-carboxamide
Chandra1, S S Mahesh2, N Srikantamurthy3
1Department of Studies in Physics, Manasagangotri, University of Mysore, Mysore 570 006, India.
Abstract:
The asymmetric unit of the title compound C25H19N5OS, contains two mol-ecules, A and B. In mol-ecule A, the dihedral angles between the pyrazole ring and the C-bound phenyl group, the N-bound phenyl group and the thia-diazole ring are 32.30 (14), 52.25 (14) and 34.94 (12)°, respectively. The corresponding angles in mol-ecule B are 33.32 (14), 50.67 (15), and 70.30 (12)°, respectively. In the crystal, the A and B mol-ecules are linked by pairs of N-H⋯N hydrogen bonds, generating R 2 (2)(8) loops. This dimer linkage is reinforced by two C-H⋯O hydrogen bonds and one C-H⋯N hydrogen bond.
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