| abstract |
1-sulfo-2-oxoazetidine derivatives represented by the following general formula (I): (FORMULA) (in which R1 represents an optionally acylated or protected amino group, X represents hydrogen or a methoxy group, R4 represents an azido group , a halogen atom, or a group represented by (FORMULA) (or R5 represents an organic residue and n represents 0.1 or 2)), and preparation process illustrated by the diagram (FORMULA) (in which R2 represents a amino acyl or protected group, R3 an amino acyl group, and R1 and R4 are as defined above). |