Stereoselective hydrostannation of substituted alkynes with trineophyltin hydride
作者:Verónica I Dodero、Liliana C Koll、Sandra D Mandolesi、Julio C Podestá
DOI:10.1016/s0022-328x(02)01213-5
日期:2002.5
alkynes with trineophyltin hydride (1) leads to vinylstannanes in good to excellent yields, the configuration of the products depending on the reaction conditions. Thus, whereas hydrostannation under radical conditions leads stereoselectively to only one of the two possible products corresponding to an anti addition in 60–99% yield, the additions catalyzed by bis(triphenylphosphine)palladium dichloride gave
单或二取代炔烃与氢化三叶新素(1)的氢化锡制得的乙烯基锡烷具有良好至极佳的收率,产物的构型取决于反应条件。因此,虽然自由基条件下的氢化锡锡立体选择性地仅导致两种可能产物中的一种对应于60-99%收率的反加成反应,但双(三苯基膦)钯二氯化物催化的加成反应却生成了顺式加合物的混合物(60-79%屈服)。给出了有机锡加合物的全部1 H-,13 C-和119 Sn-NMR以及质谱数据。