Synthesis of dineophyltin dihydride and stereoselective hydrostannation of alkynes and (E)-trisubstituted alkenes
作者:Adriana E. Zúñiga、Pablo M. Fidelibus、Sandra D. Mandolesi、Julio C. Podestá
DOI:10.1016/j.jorganchem.2010.12.033
日期:2011.4
The four steps synthesis starting from benzyl chloride and Sn was shown to be more convenient than the two step direct alkylation of SnCl4. The study of the free radical hydrostannation of mono- and disubstituted acetylenes with hydride 3 shows that they are stereoselective and that the stereoisomers obtained in higher proportion are stable and easily separated by column chromatography. Some preliminary
本文报道了通过两种方法合成二氢硬脂酸叶绿素(3)。从苄基氯和Sn开始的四步合成显示出比SnCl 4的两步直接烷基化更方便。对单取代和二取代的乙炔与氢化物3进行自由基氢化的研究表明,它们是立体选择性的,而且较高比例获得的立体异构体是稳定的,并且易于通过柱色谱法分离。还提供了一些关于新的二乙烯基取代的二茂铁蛋白化合物在Stille反应中的化学反应性的初步研究。(五)三取代乙烯类根治hydrostannatation 3可能由于空间因素而未能成功。还报道了溴氰地那丁的制备(27)。向(E)-2,3-二取代的甲基丙烯酸中自由基加成27,会导致相应的赤型和苏式加合物以非对映异构体过量(de)的形式混合,占74-90%。