硅氢加成
化学
区域选择性
卡宾
三乙基硅烷
二甲基硅烷
苯乙炔
药物化学
硅烷
铂金
炔烃
催化作用
氧化加成
铑
高分子化学
钯
配体(生物化学)
过渡金属卡宾配合物
立体化学
有机化学
金属转移
硅烷
作者
Guillaume De Bo,Guillaume Berthon-Gelloz,Bernard Tinant,István E. Markó
出处
期刊:Organometallics
[American Chemical Society]
日期:2006-03-10
卷期号:25 (8): 1881-1890
被引量:106
摘要
The hydrosilylation of terminal alkynes by silanes catalyzed by N-heterocyclic carbene platinum(0) complexes has been investigated. The alkynes included 1-octyne and phenylacetylene. The silanes investigated were bis(trimethylsilyloxy)methylsilane, (trimethylsilyloxy)dimethylsilane, tert-butyldimethylsilane, triphenylsilane, phenyldimethylsilane, triethylsilane, and triethoxysilane. X-ray crystal structures for [Pt(N,N‘-dicyclohexylimidazol-2-ylidene)(η2-dimethylacetylenedicarboxylate)2] (8) and [Pt{C(E)C(E)−C(E)C(E)}(N,N‘-dimethylbenzimidazol-2-ylidene)(σ-NCCH3)] (10) (E = CO2Me) have been obtained. A selectivity model, based on structural parameters of the N-heterocyclic carbene, has been devised in order to rationalize the observed regioselectivity obtained. By a judicious choice of catalyst, alkyne, and silane, the regioselectivity of the addition can be controlled.
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