A simple and highly diastereoselective synthesis of a 1β-methylcarbapenem key intermediate by deallyloxycarbonylation using palladium complexes
作者:Toshiyuki Murayama、Akifumi Yoshida、Toyohiko Kobayashi、Takashi Miura
DOI:10.1016/0040-4039(94)85196-4
日期:1994.4
A Simple, highly diastereoselective synthesis of the key 1β-methylcarbapenem intermediate 1 has been accomplished via a palladium catalyzed deallyloxycarbonylation of diallyl malonate derivative 4a which was readily prepared from (3S,4R)-4-acetoxy-3-[(R)-1-(t-butyldimethylsilyloxy)ethyl]-2-azetidinone 2 in two steps.
通过钯催化的丙二烯丙基丙二酸酯衍生物4a的钯催化的脱烯丙氧羰基化反应,可以轻松地完成关键的1β-甲基卡巴培南中间体1的简单,非对映选择性合成,这很容易从(3S,4R)-4-acetoxy-3-[[R)-1 -(叔丁基二甲基甲硅烷氧基)乙基] -2-氮杂环丁酮2分两个步骤。