通式RCH = CHSiMe 3- n Ph n的1-Tri(苯基,甲基)甲硅烷基-1-烯烃(n = 1-3,R = C m H 2 m +1,m = 5,6,8 ,10和12; Ph)已通过一种新颖的方法制备。通过钌和铑配合物催化的乙烯基三(苯基,甲基)硅烷与1-烯烃和苯乙烯的非常有效的交叉复分解反应。反应混合物中过量十倍的1-烯烃以高达90%的高收率(进而转化为乙烯基硅烷)得到了立体定向的1-三(苯基,甲基)甲硅烷基-1-烯烃(主要为E-异构体)。产物通过光谱鉴定(IR,拉曼,1H,13 C NMR和GC-MS)方法。
A Ligand-Free Pt<sub>3</sub>Cluster Catalyzes the Markovnikov Hydrosilylation of Alkynes with up to 10<sup>6</sup>Turnover Frequencies
作者:Miguel A. Rivero-Crespo、Antonio Leyva-Pérez、Avelino Corma
DOI:10.1002/chem.201605520
日期:2017.1.31
The Pt‐catalyzed hydrosilylation of alkynes is the procedure of choice to obtain vinylsilanes, and is claimed to be the most relevant application of Pt in organicsynthesis. More than half a century after its discovery, only β‐vinylsilanes (anti‐Markovnikov addition) are obtained with simple Pt catalysts, whereas α‐vinylsilanes (Markovnikov addition) remain elusive compounds. Here the catalysis of