Hydrostannylation-Cross-Coupling Strategy for the Stereoselective Synthesis of Alkylidenemalonates and Related α,β-Unsaturated Esters
作者:Shinichi Fujiwara、Romain Cadou、Yousuke Yamaoka、Kiyosei Takasu、Ken-ichi Yamada
DOI:10.1002/ejoc.201403429
日期:2015.2
A method for the stereoselective synthesis of alkylidenemalonates and related α,β-unsaturated esters by a hydrostannylation–cross-coupling process has been developed. Pd-catalyzed and radical hydrostannylation of propiolate derivatives stereoselectively provided α-alkoxycarbonyl (E)- and (Z)-vinylstannanes, respectively, which were then converted into alkylidenemalonates by the Stille coupling reaction
已经开发了一种通过氢化甲硅烷基化-交叉偶联过程立体选择性合成亚烷基丙二酸酯和相关 α,β-不饱和酯的方法。丙炔酸酯衍生物的 Pd 催化和自由基氢化锡烷基化分别立体选择性地提供 α-烷氧基羰基 (E)-和 (Z)-乙烯基锡烷,然后通过 Stille 偶联反应将其转化为亚烷基丙二酸酯。对于 Pd 催化的反应,也可以实现一锅法。