Disclosed is a process comprising the steps of treating a compound of the formula:
with a carboxylic acid R4CO2H in the presence of a triorganophosphine and an activating agent therefor to prepare a compound of the formula:
followed by hydrolysis to cleave COR4; wherein R' is hydrogen or a readily removable protecting group and R4CO is a readily removable acyl radical.
This process can be used for the stereocontrolled total synthesis of thienamycin.
本发明公开了一种工艺,包括以下步骤:在三有机膦和活化剂存在下,用
羧酸 R4CO2H 处理式
在三有机膦及其活化剂存在下,用
羧酸 R4CO2H 处理制备式化合物:
其中 R' 为氢或易于去除的保护基,R4CO 为易于去除的酰基。
该工艺可用于
噻吩霉素的立体控制全合成。