| 摘要 |
1-Sulfo-2-oxoazetidine derivatives represented by the general formula (I): <IMAGE> [wherein R1 represents an amino group optionally acylated or protected, X represents hydrogen or methoxy, R4 represents an azido group, a halogen atom, or a group represented by <IMAGE>(wherein R5 represents an organic residue, and n represents 0, 1 or 2)], and a process for their preparation shown by the scheme: <IMAGE>[wherein R2 represents an acylated or protected amino group, R3 represents an acylated amino group, and R1 and R4 are the same as defined above]. |
