5-benzylidene-8-ethylthiocarbamoyl-9-phenyl-7,8-diazabicyclo[4.3.0]non-6-ene

Abstract

The title compound, C23H25N3S, was obtained by the reaction of dibenzylidenecyclohexanone with hydrazine hydrate, followed by the treatment of the resulting pyrazoline compound with ethyl isothiocyanate. The structure of the title compound was elucidated by IR, H-1 NMR spectroscopy and elementary analysis, and the stereochemical properties were investigated by X-ray analysis. The cyclohexane ring has a slightly distorted chair conformation while the 2-pyrazoline system is highly flattened from an ideal envelope conformation. One phenyl ring and thiocarbamoyl group are linked to the 2-pyrazoline system in axial and in equatorial positions, respectively. The other phenyl ring is bonded to the exocyclic double bond.