Acceleration Effects of Phosphine Ligands on the Rhodium-Catalyzed Dehydrogenative Silylation and Germylation of Unactivated C(sp<sup>3</sup>)–H Bonds
作者:Masahito Murai、Hirotaka Takeshima、Haruka Morita、Yoichiro Kuninobu、Kazuhiko Takai
DOI:10.1021/acs.joc.5b00920
日期:2015.6.5
phosphine ligands on the rhodium-catalyzed dehydrogenative silylation and germylation of unactivated C(sp3)–H bonds. The reactivity was affected by the steric and electronic nature of the phosphine ligands. The use of the bulky and electron-rich diphosphine ligand (R)-DTBM-SEGPHOS was highly effective to yield the dehydrogenative silylation products selectively in the presence of a hydrogen acceptor
当前的工作描述了膦配体在铑催化的未活化的C(sp 3)–H键的脱氢甲硅烷基化和发芽化上的明显加速。反应性受膦配体的空间和电子性质影响。使用庞大且富含电子的二膦配体(R)-DTBM-SEGPHOS在氢受体存在下选择性地产生脱氢甲硅烷基化产物非常有效。的适当选择Ç 2 -对称的手性二膦配体允许通过C(SP的对映选择性desymmetrization不对称脱氢硅烷化3)-H键。C(sp 3还使用铑配合物和宽咬角二膦配体的组合检测了具有脱氢作用的–H键,从而以高收率提供了相应的2,3-二氢苯并[ b ]锗。