Synthesis of bicyclic aza-enones via a lewis acid catalysed Michael-type addition with silyl enol ethers bearing a nitrogen atom.
作者:Duhamel Pierre、Deyine Abdallah、Poirier Jean-Marie
DOI:10.1016/s0040-4039(00)79248-3
日期:1993.6
Silyl enol ethers bearing a nitrogen atom protected by an electron-withdrawing group give in high yield a Micheal-type addition with hemiacetal vinylog or a mixture of methyl vinyl ketone and an alcohol in the presence of boron trifluoride etherate as a catalyst. The aza-1,5-diketones so prepared can be cyclised leading to aza-enones precursors of some biologycally active structures.
在三氟化硼醚化物作为催化剂存在下,带有由吸电子基团保护的氮原子的甲硅烷基烯醇醚以半缩醛乙烯醇或甲基乙烯基酮与醇的混合物高收率地得到米歇尔型加成物。如此制备的aza-1,5-二酮可以被环化,产生某些具有生物学活性的结构的aza-烯酮前体。