Methyl 2-{[(3-methyl-5-oxo-1-phenyl-4,5-dihydro-1H-pyrazol-4-ylidene)(thiophen-2-yl)methyl]amino}-3-phenylpropionate

Methyl 2-{[(3-methyl-5-oxo-1-phenyl-4,5-dihydro-1H-pyrazol-4-ylidene)(thiophen-2-yl)methyl]amino}-3-phenylpropionate

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In the title compound, C25H23N3O3S, an intramolecular N—H.O rowenta dr8270 interaction generates an S(6) ring, which stabilizes the enamine–keto form of the compound.This S(6) ring and the pyrazole ring are essentially coplanar, making a dihedral angle of 1.49 (6)°.The bond lengths within the S(6) ring of the molecule lie between classical single- and double-bond lengths, indicating extensive conjugation.

The structure exhibits a san diego padres 1998 world series hat thienyl-ring flip disorder, with occupancy factors in the ratio 64.7 (3):35.3 (3).