Aspects of the chemistry of 4-tributylstannyl-, 4-trimethylsilyl- and 2-phenylsulfinylallylstannanes
作者:Simon V Mortlock、Eric J Thomas
DOI:10.1016/s0040-4020(98)00183-5
日期:1998.4
stannanes 3 and 4 have been prepared by treatment of the allylic sulfones 6 and 7 with tributyltin hydride under free-radical conditions and shown to react under non-catalysed and Lewis acid promoted conditions with 4-nitrobenzaldehyde to give the anti- and syn-products 9/11 and 8/10, respectively, with reasonable levels of stereoselectivity. The 2-arylsulfinylpropenylstannanes 17 and 18 were also
通过在自由基条件下用氢化三丁基锡处理烯丙基砜6和7,制备了4-三甲基甲硅烷基-和4-三丁基锡烷基丁-2-烯基(三丁基)锡烷酮3和4,并显示了在非催化和路易斯条件下反应。酸促进的条件与4-硝基苯甲醛,得到的抗-和SYN -products 9/11和8/10分别与立体选择性的合理的水平。也从砜15和16制备2-芳基亚磺酰基丙烯基锡烷17和18。,并发现它会发生立体选择性氯化钛(IV)促进与醛的反应。