摘要:
Azetidinone compounds represented by the general formula (I), wherein R1 represents a substituted or unsubstituted phenyl group, R2 represents a carboxyl-protecting group, X represents a hydrogen atom or a chlorine atom, Y represents$(7,)$or -SR4 (wherein R3 represents a lower alkyl group) or -OR5 (wherein R5 represents a halogen-containing lower alkyl group) and R4 represents a substituted or unsubstituted, sulfur- and/or nitrogen-containing five-membered aromatic hetercyclic residue).
摘要:
A process for preparing azetidinone derivatives represented by the general formula (I), wherein R1 represents straigth-chain or branched lower alkyl, substituted or unsubstituted aryl, substituted or unsubstituted phenylmethyl, or substituted or unsubstituted phenyloxymethyl, R2 represents hydrogen, optionally substituted hydrocarbyl or an amino-protecting group selected from among acyl, silyl, sulfonyl, and phosphonyl, R3 represents a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocylic group.