3,4-Dimethyl-1-phenylpyrano[2,3-c]pyrazol-6(1H)-one

Abstract

In the title compound, C14H12N2O2, the dihedral angle between the phenyl ring and the 3,4-dimethyl­pyrano[2,3-c]pyrazol-6(1H)-one system is 7.28 (6)°. An intra­molecular C—H⋯O inter­action generates an S(6) ring. In the crystal, the mol­ecules are linked by C—H⋯O hydrogen bonds, forming C(8) chains. C–H⋯π and π–π inter­actions [centroid–centroid separation = 3.6374 (12) Å] further consolidate the packing.

1-[2,6-Dichloro-4-(trifluoromethyl)phenyl]-3,4-dimethylpyrano[2,3-c]pyrazol-6(1H)-one

“…For related structures, see: Ramsay & Steel (1985); Ahmad et al (2011). For bond-length data, see: Allen et al (1987).…”

“…Similar product formation was reported by Vaid et al (1986). The crystal structure of 3,4-dimethyl-1-(2pyridyl)pyrano[2,3-c]pyrazol-6(1H)-one was reported by Ramsay & Steel (1985) and the structure of 3,4-dimethyl-1phenylpyrano[2,3-c]-pyrazol-6(1H)-one was reported by Ahmad et al (2011). The title compound 1-(2,6-dichloro-4-(trifluoromethyl)phenyl)-3,4-dimethylpyrano[2,3-c]pyrazol-6(1H)-one [C 15 H 9 Cl 2 F 3 N 2 O 2 ], was prepared by the reaction of 2,6-dichloro-4-trifluoromethyl-phenyl hydrazine with excess of ethyl acetoacetate.…”