Regioselective Lithiation of Silyl Phosphine Sulfides: Asymmetric Synthesis of <i>P</i>-Stereogenic Compounds
作者:Jonathan J. Gammon、Peter O’Brien、Brian Kelly
DOI:10.1021/ol901977p
日期:2009.11.5
lithiation of a dimethylphosphine sulfide), a two-step process of regioselective lithiation-trapping and silyl group removal has been used to prepare a range of P-stereogenic compounds, including precursors to diphosphine ligands (e.g., Mini-PHOS). This two-step protocol delivers products with the opposite configuration to that obtained by direct asymmetric lithiation−trapping of a dimethylphosphine sulfide
从99:1 er的三甲基甲硅烷基取代的磷化氢硫化物(由n -BuLi /(-)-天冬氨酸介导的二甲基膦硫化物的不对称锂化反应生成)开始,分两步进行区域选择性锂化捕获和甲硅烷基去除被用于制备一系列P -stereogenic化合物,包括前体二膦配体(例如,微型-PHOS)。此两步协议可提供与使用n -BuLi /(-)-partaine进行二甲基膦硫化物直接不对称锂化-阱化所获得的产品具有相反配置的产品。