NOVEL METHOD FOR PREPARING 1-OXACEPHALOSPORIN DERIVATIVE

摘要

The present invention relates to a novel method for preparing a 1-oxacephalosporin derivative, which is an intermediate for the synthesis of 1-oxacephalosporin which is useful as an antibacterial agent. The preparation method of the present invention uses a simple halogenating agent to show remarkable stability, have a simple reaction process, allow a reaction to be readily controlled, and reduce reaction time, and thus is very efficient and improves the production yield of 1-oxacephalosporin which is useful as an antibacterial agent.