Practical Synthesis of Ethyl 1-(<i>tert</i>-Butoxycarbonyl)-4-(1-pyrrolidinyl)-4-piperidineacetate, an Intermediate of a Novel Antiarteriosclerotic, Utilizing Aza-Michael Addition Promoted by LiBr
作者:Akira Iida、Naohiro Onodera、Tatsuro Yasukata
DOI:10.1246/cl.2012.1703
日期:2012.12.5
The aza-Michael addition of pyrrolidine to β,β-dialkylated unsaturated ester 6 utilizing LiBr proceeded smoothly to give the inaccessible ethyl 1-(tert-butoxycarbonyl)-4-(1-pyrrolidinyl)-4-piperidineacetate (7), which is an intermediate of novel antiarteriosclerotic 1.
利用 LiBr 将吡咯烷与β,β-二烷基不饱和酯 6 进行杂-迈克尔加成反应,顺利地生成了不可获取的 1-(叔丁氧羰基)-4-(1-吡咯烷基)-4-哌啶乙酸乙酯(7),它是新型抗动脉硬化药 1 的中间体。