A stereoselective synthesis of a key 1β-methylcarbapenem intermediate via a diastereoselective decarboxylation
作者:Woo-Baeg Choi、Hywyn R.O. Churchill、Joseph E. Lynch、Andrew S. Thompson、Guy R. Humphrey、R.P. Volante、Paul J. Reider、Ichiro Shinkai
DOI:10.1016/0040-4039(94)85197-2
日期:1994.4
-1-t-butyldimethylsilyloxy)ethyl]-2-azetidinone via a sequence involving coupling with 2,2,5-trimethyl-1,3-dioxan-4,6-dione , N-silylation, solvolysis of the methylmeldrum's acid moiety and a stereoselective acid catalyzed decarboxylation.
由(3R,4R)-4-乙酰氧基-制备(3S,4S)-3 [(R)-1-(叔丁基二甲基甲硅烷氧基)乙基] -4-[(R)-1-羧乙基] -2-氮杂环丁酮。3 - [(R)-1-吨-butyldimethylsilyloxy)乙基] -2-氮杂环丁酮通过涉及与2,2,5-三甲基-1,3-二恶烷-4,6-二酮耦合的序列,ñ -silylation,溶剂分解甲基熔体的酸部分和立体选择性酸催化的脱羧反应。