Direct Monoalkylation of Alkyl Phosphinates to Access H-Phosphinic Acid Esters
作者:Jean-Luc Montchamp、Isabelle Abrunhosa-Thomas、Patrice Ribière、Alicia C. Adcock
DOI:10.1055/s-2005-924768
日期:——
Simple alkyl phosphinates prepared by the silicate esterification method can be alkylated under Barbier-like conditions with butyl lithium at -78 °C followed by warming to room temperature. The method is limited to the more reactive electrophile such as allylic bromides and alkyl iodides. With these electrophiles good yields of H-phosphinic acid esters are generally obtained in a straightforward manner
通过硅酸酯化方法制备的简单烷基次膦酸盐可以在类似巴比尔的条件下与丁基锂在 -78 °C 下烷基化,然后升温至室温。该方法仅限于反应性更强的亲电子试剂,例如烯丙基溴化物和烷基碘化物。使用这些亲电子试剂,通常以简单的方式获得高产率的 H-次膦酸酯。