Penicillins and processes for their preparation and use

摘要

6-[ alpha -(Imidazolidin-2-on-1-carbonylamido)acetamido]-penicillanic acids substituted in the 3-position of the imidazolidinone ring with phenyl or a substituted phenyl group and on the alpha -carbon atom of the acetamido bridge with a phenyl, thienyl, cyclohexenyl or cyclohexadienyl group, and their salts, are antibacterial agents. The compounds, of which alpha -(3-phenylimidazolidin-2-on-1-ylcarbonylamino)benzylpenicillin is a representative example, are prepared by acylation of the corresponding 6-( alpha -aminoacetamido)penicillanic acid or a derivative thereof.