Syntheses of 1-Arylidenamino-2,4-disubstituted- 2-imidazoline-5-ones. X-Ray Structure of 1-Benzylidenamino-2-phenyl-4-benzylidene- 2-imidazoline-5-one

The present paper deals with syntheses and study of 1-arylidenamino-2,4-disubstituted- 2-imidazoline-5-ones. The compounds were prepared by cyclization of arylidenehydrazides of 2-benzoylamino-3-arylacrylic acid which were synthesized via condensation of hydrazides of 2-benzoylamino-3-arylacrylic acid with substituted benzaldehydes. The structure of 1-benzylidenamino-2-phenyl-4-benzylidene-2-imidazoline-5-one was determine by single crystal X-ray analysis. Geometry optimization of the above compound at the semi-empirical PM3 level is also presented and compared with the X-ray data.