Synthesis of highly functionalized pyrrolidines as tunable templates for the direct access to (±)-coerulescine and the tricyclic core of martinellines
作者:Ronan Le Goff、Ata Martin Lawson、Adam Daïch、Sébastien Comesse
DOI:10.1039/c3ob27472a
日期:——
An aza-Michael induced ring closure (aza-MIRC) tandem reaction of benzyl (2-bromoethyl)carbamate with various Michael acceptors is described. The N-Cbz-β-gem-disubstituted pyrrolidines thus obtained were proved to be versatile intermediates for the rapid access to both martinelline and spirooxindole backbones. An application of this strategy towards an expedient 4 step total synthesis of (±)-coerulescine is also presented.
描述了一种苄基(2-溴乙基)氨基甲酸酯与各种迈克尔受体的氮-迈克尔诱导环闭合(aza-MIRC)串联反应。由此获得的N-Cbz-β-gem-二取代吡咯烷被证明是快速合成马丁尼林和螺氧吲哚骨架的多功能中间体。还展示了该策略在(±)-青色素的高效四步全合成中的应用。