The present invention relates to β-lactam compound having the general formula (I):
wherein R1 is a protective group for hydroxy group, R2, R3 and R4 are selected from a lower alkyl group of C, to C4, phenyl group and aralkyl group and a process for preparing thereof which comprises reacting enolsilylether having the general forumal (III)
wherein R1, R2, R3 and R4 are as above, with chlorosulfonylisocyanate and then reducing the obtained product. β-Lactam compound of the present invention is a useful intermediate for preparing carbapenem β-lactam compound.
本发明涉及具有通式(I)的β-内
酰胺化合物:其中R1是羟基的保护基团,R2、R3和R4选自C,至C4的低级烷基、
苯基和芳烷基,以及制备其的工艺,该工艺包括使具有通式(III)的
烯醇基醚(其中R1、R2、R3和R4同上)与
氯磺酰基
异氰酸酯反应,然后还原得到的产物。 本发明的β-内
酰胺化合物是制备
碳青霉
烯类β-内
酰胺化合物的有用
中间体。