Catalytic asymmetric deprotonation of phosphine boranes and sulfides as a route to P-stereogenic compounds
作者:Jonathan J. Gammon、Steven J. Canipa、Peter O’Brien、Brian Kelly、Sven Taylor
DOI:10.1039/b806864j
日期:——
A comparison between phosphine boranes and sulfides in their catalytic asymmetricdeprotonation using organolithiums and sub-stoichiometric amounts of (-)-sparteine has revealed superior catalytic efficiency in the phosphine sulfide deprotonation.
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