Hydrosilylation of Carbonyl-Containing Substrates Catalyzed by an Electrophilic η<sup>1</sup>-Silane Iridium(III) Complex
作者:Sehoon Park、Maurice Brookhart
DOI:10.1021/om100818y
日期:2010.11.22
Hydrosilation of a variety of ketones and aldehydes using the cationic iridium catalyst, (POCOP)Ir(H)(acetone)(+), 1, (POCOP = 2,6-bis(di-tert-butyl phosphinito)phenyl) is reported. With triethyl silane, all but exceptionally bulky ketones undergo quantitative reactions employing 0.5 mol% catalyst in 20-30 min at 25 degrees C. Hydrosilation of esters and amides results in over-reduction and cleavage
报道了使用阳离子铱催化剂 (POCOP)Ir(H)(丙酮)(+), 1, (POCOP = 2,6-双(二叔丁基膦)苯基) 对各种酮和醛进行氢化硅烷化. 使用三乙基硅烷时,除特别大的酮外,所有酮类都会在 25 摄氏度、20-30 分钟内使用 0.5 mol% 的催化剂进行定量反应。酯和酰胺的氢化硅烷化分别导致 CO 和 CN 键的过度还原和断裂。4-叔丁基环己酮氢化硅烷化的非对映选择性已经使用多种硅烷进行了研究,并且高度依赖于温度。使用EtMe(2)SiH,分析顺式比例:作为温度函数的反式硅氢化产物为 DeltaDeltaH(double dagger) (DeltaH(double dagger) (trans) - DeltaH(double dagger) (cis)) 和 DeltaS(double dagger) (DeltaS(double dagger) (trans) - DeltaS(double