rapidly when tert-butyl methyl ether is added under stirring. When, in general after a few minutes, the generation of the (triphenyl-phosphonio)alkanide is complete, it can be immediately used for the Wittig olefination of a carbonyl compound. Compared to sodium amide based “instant ylids”, the new blends offer little advantage as long as simple phosphonium salts are ingredients but they extend considerably
将细粉状的烷基三苯基phosph盐和
氢化钾以1:1的摩尔比混合,得到一种即用型粉末,当在搅拌下添加
叔丁基甲基醚时,其成分会迅速反应。一般在几分钟后,当(三苯基-膦酰基)烷化物的生成完成时,可以立即将其用于羰基化合物的维蒂希烯化。与基于酰胺
钠的“即时脂质”相比,只要简单的phospho盐为成分,这种新混合物就没有什么优势,但是它们大大延长了含杂取代衍
生物(如甲
硫基甲基或
吡啶基三苯基phosph盐)的混合物的保质期。