申请人:SUMITOMO PHARMACEUTICALS COMPANY, LIMITED
公开号:EP0679652A1
公开(公告)日:1995-11-02
Novel and effective process for preparing a carbapenem compound of the formula (III):
wherein R₁ and R₂ are each H or lower alkyl, R₃ is lower alkyl, R₄ is protecting group, L is substituted or unsubstituted arylsulfonyloxy, lower alkanesulfonyloxy, halogeno-lower alkanesulfonyloxy, di-lower alkylphosphoryloxy, etc., and X is H or protected hydroxy, which comprises reacting β-lactam compound (I) with acetic acid ester derivative (II), in the presence of base, followed by treating the product with active esterifying agent for hydroxy group, said compound (III) being useful as intermediate for 1β-alkylcarbapenem compound having antibacterial activity.
制备式(III)碳青霉烯类化合物的新颖有效的工艺:
其中 R₁ 和 R₂ 均为 H 或低级烷基,R₃ 为低级烷基,R₄ 为保护基,L 为取代或未取代的芳基磺酰氧基、低级烷基磺酰氧基、卤代低级烷基磺酰氧基、二低级烷基磷酰氧基等、和 X 是 H 或受保护的羟基,其中包括在碱存在下使β-内酰胺化合物(I)与乙酸酯衍生物(II)反应,然后用活性酯化剂处理羟基产物,所述化合物(III)可用作具有抗菌活性的 1β- 烷基碳青霉烯化合物的中间体。