A difluorosulfide as a Freon-free source of phosphonodifluoromethyl carbanionIn memory of Arnaud who passed away in his 25th year.
作者:Arnaud Henry-dit-Quesnel、Loic Toupet、Jean-Claude Pommelet、Thierry Lequeux
DOI:10.1039/b301729j
日期:——
as starting chemicals. To circumvent this limitation, we report the preparation of a thioether as a new source of the lithiodifluoromethylphosphonate. This methodology avoiding the use of HCFCs involves a selective fluorination of sulfide followed by a thiaphilic addition of an organometallic reagent, which offers an alternative route to obtain phosphonodifluoromethyl carbanion. A contrasted reactivity
由于环境保护法限制将HCFC和CFC用作起始化学品,二氟甲基膦酸酯的合成正变得越来越困难。为了规避这一限制,我们报告了硫醚的制备,作为硫代二氟甲基膦酸酯的新来源。避免使用HCFC的这种方法学涉及到硫化物的选择性氟化,然后硫代有机金属试剂的加入,这为获得膦酰二氟甲基碳负离子提供了另一种途径。还注意到由于中等作用而形成的对比的反应性,其允许向硫醚中添加包括硝基烯烃和DMF在内的多种亲电试剂。