From (3S, 4R)-4-acetoxy-3-[(R)-1-tert-butyldimethylsiloxy)ethyl]azetidine-2-one (AOSA), a common precursor for the synthesis of β-lactam antibiotics, zinc-mediated Barbier-type reaction and subsequent silver(I)-catalyzed hydroamination were conducted to build the carbapenem skeleton bearing carboxylate ester at the C-3 position. Depending on catalysts used, a new type of rearrangement was observed
来自 (3 S , 4 R )-4-acetoxy-3-[( R )-1- tert -butyldimethylsiloxy)ethyl]azetidine-2-one (AOSA),一种合成 β-内酰胺抗生素的常用前体,
锌进行了介导的Barbier型反应和随后的
银(I)催化加
氢胺化以在C-3位构建碳青霉烯骨架承载
羧酸酯。根据所使用的催化剂,观察到一种新型重排。它还受反应时间和催化剂量的影响。