A multistep process for preparing azetidinone intermediate useful for making anti-bacterial penems and car- bapenams is disclosed. The process uses the group as an easily
removable nitrogen protecting groups.
本发明公开了一种制备氮杂
环丁酮中间体的多步骤工艺,这种中间体可用于制造抗菌青霉烯和车前子。 该工艺使用的基团是易于去除的氮保护基团。