6-Amino-1-benzyl-4-(4-chlorophenyl)-3-(4-pyridyl)-1,4-dihydropyrano[2,3-c]-pyrazole-5-carbonitrile

The crystal structure of the title compound, C25H18ClN5O, was determined in the course of our studies on the synthesis of 1,4-dihydropyrano[2,3-c] pyrazole as an inhibitor of the p38 mitogen-activated protein kinase (MAPK). The compound was prepared via a base-catalysed synthesis from 1-benzyl-3-(4-pyridyl)-1H-pyrazol-5(4H)-one with p-chloroaldehyde and malononitrile. The crystal data obtained were used to generate a three-dimensional pharmacophore model for in silico database screening. The phenyl ring is disordered over two positions, with site occupancy factors of 0.55 and 0.45. The dihedral angles between the 1,4-dihydropyrano[2,3-c] pyrazole unit and the chlorophenyl and pyridine rings are 83.7 (1) and 16.0 (1)degrees, respectively. The chlorophenyl and pyridine rings make a dihedral angle of 86.8 (2)degrees.