1,5-Dimethyl-4-(1-methyl-3-oxo-3-phenylprop-1-enylamino)-2-phenyl-1H-pyrazol-3(2H)-one

Acta Crystallographica Section E

Structure Reports Online

Volume 67, Part 7 (July 2011)

organic compounds

jh2294 scheme

Acta Cryst. (2011). E67, o1640 [ doi:10.1107/S1600536811021945 ]

1,5-Dimethyl-4-(1-methyl-3-oxo-3-phenylprop-1-enylamino)-2-phenyl-1H-pyrazol-3(2H)-one

H. Zhu, Z. Wang, J. Ren, M. Zhang and W. Xu

Abstract: In the title compound, C₂₁H₂₁N₃O₂, an intramolecular N-HO interaction generates an S(6) ring, which stablizes the enamine-keto tautomer. The S(6) ring makes dihedral angles of 33.07 (7), 56.50 (8) and 38.59 (8)°, respectively, with the benzoylacetone benzene ring and the antipyrine pyrazole and benzene rings.