Reduction of phosphineoxides into the corresponding phosphines using PhSiH3 as a reducing agent and Ph3C+[B(C6F5)4]− as an initiator is described. The process is highly efficient, reducing a broad range of secondary and tertiary alkyl and arylphosphines, bearing various functional groups in generally good yields. The reaction is believed to proceed through the generation of a silyl cation, which reaction
描述了使用PhSiH 3作为还原剂和Ph 3 C + [B(C 6 F 5 ) 4 ] -作为引发剂将氧化膦还原成相应的膦。该方法效率很高,可以减少各种带有各种官能团的仲和叔烷基和芳基膦,收率通常很高。据信,该反应通过生成甲硅烷基阳离子进行,该阳离子与氧化膦反应提供鏻盐,进一步被硅烷还原以提供所需的膦和硅氧烷。
An effective synthesis of chiral atropoisomeric biaryl phosphine-olefin compounds via palladium-catalyzed enantioselective C-H olefination has been developed for the first time. The reactions are operationally simple, tolerate wide functional groups, and have a good ee value, Notably, P(O)R-2 not only acts as the directing group to direct C-H activation in order to make a useful ligand but also serves to facilitate composition of the product in a useful manner in this transformation.