Alternative Synthesis of (<i>Z</i>)-1-Aryl-1-(tributylstannyl)-2-(triethylgermyl)ethenes and the Unprecedented Germyl 1,2-Migration during the Destannylation of the Adducts
作者:Taichi Nakano、Yoshiya Senda、Takashi Miyamoto
DOI:10.1246/cl.2000.1408
日期:2000.12
A specific combination catalyst, Pd(dba)2 and 4-ethyl-1-phospha-2,6,7-trioxabicyclo[2.2.2]octane, effectively catalyzed the addition of tributyl(triethylgermyl)stannane to arylacetylenes in tetrahydrofuran to give (Z)-1-aryl-2-(germyl)-1-(stannyl)ethenes in high yields. The (Z)-1-aryl-2-(germyl)-1-(stannyl)ethenes were subject to the unprecedented germyl 1,2-migration during the destannylation using HI / TBAI in toluene to produce 1-aryl-1-(germyl)ethenes in high yields.
Pd(dba)2 和 4-乙基-1-磷杂-2,6,7-三氧杂双环[2.2.2]辛烷是一种特定的组合催化剂,可有效催化三丁基(三乙基锗基)锡与芳基乙炔在四氢呋喃中的加成反应,从而高产率地得到 (Z)-1- 芳基-2-(胚芽基)-1-(锡基)乙烯。在甲苯中使用 HI / TBAI 进行去烷基化时,(Z)-1-芳基-2-(胚芽基)-1-(锡基)乙烯会发生前所未有的胚芽基 1,2 迁移,从而以高产率生成 1-芳基-1-(胚芽基)乙烯。