Tandem Hydrosilylation/<i>o</i>-C–H Silylation of Arylalkynes Catalyzed by Ruthenium Bis(silyl) Aminophosphine Complexes
作者:Takeo Kitano、Takashi Komuro、Rikima Ono、Hiromi Tobita
DOI:10.1021/acs.organomet.7b00528
日期:2017.8.14
An unprecedented reaction via consecutive trans-selective hydrosilylation and o-C–H silylation of arylalkynes with hydrosilanes was developed by use of ruthenium complex catalysts Ruκ3(Si,O,Si)-xantsil}(CO)(PR3) (R = NC4H8 (1-Pyrr), NC5H10 (1-Pip); xantsil = (9,9-dimethylxanthene-4,5-diyl)bis(dimethylsilyl)). This reaction proceeded with gentle heating at 40–60 °C and afforded novel 2,α-bis-silylated
通过连续的反式-选择性氢化硅烷化和前所未有的反应ö与含氢硅烷arylalkynes的-C-H甲硅烷基化物通过使用钌配合物催化剂的钌开发κ 3(硅,Õ,硅)-xantsil}(CO)(PR 3)( R = NC 4 H 8(1-Pyrr),NC 5 H 10(1-Pip);黄体素=(9,9-二甲基x吨-4,5-二基)双(二甲基甲硅烷基))。该反应在40–60°C的温和加热下进行,得到新颖的2,α-双甲硅烷基化(Z)-二苯乙烯或(Z)-苯乙烯衍生物2以及等摩尔量的(E)-/(Z)-芳基烯烃作为副产物。通过使用由较小体积的三氨基膦P(NC 4 H 8)3和具有中等体积和吸电子取代基的氢硅烷HSiMe(OSiMe 3)2连接的催化剂1-Pyrr,形成2的选择性达到最大。