Manganese‐Catalyzed Hydrofunctionalization of Alkenes
作者:Jonathan R. Carney、Barry R. Dillon、Leonie Campbell、Stephen P. Thomas
DOI:10.1002/anie.201805483
日期:2018.8.13
The manganese‐catalyzed hydrosilylation and hydroboration of alkenes has been developed using a single manganese(II) precatalyst and reaction protocol. Both reactions proceed with excellent control of regioselectivity and in high yields across a variety of sterically and electronically differentiated substrates (25 examples). Alkoxide activation, using NaOtBu, was key to precatalyst activation and
锰催化烯烃的氢化硅烷化和氢硼化反应是使用单一的锰(II)预催化剂和反应方案开发的。两种反应均能很好地控制区域选择性,并能在多种空间和电子分化的底物上获得高收率(25个实例)。使用NaO t Bu进行的醇盐活化是催化剂前活化和反应活性的关键。对于这两种已开发的方法,催化剂的负载量都低至0.5 mol%,从而实现了跨各种官能团和以克为单位的催化作用。
Study on the anti‐sulfur‐poisoning characteristics of platinum–acetylide–phosphine complexes as catalysts for hydrosilylation reactions
作者:Jiayun Li、Congbai Niu、Jiajian Peng、Yuan Deng、Guodong Zhang、Ying Bai、Chao Ma、Wenjun Xiao、Guoqiao Lai
DOI:10.1002/aoc.3149
日期:2014.6
A series of platinum–acetylide–phosphinecomplexes were synthesized and their anti‐sulfur‐poisoningcharacteristics investigated. In comparison with Speier's and Karstedt's catalysts, the platinum–acetylide–phosphinecomplexes exhibited both higher catalytic activity and selectivity for the β‐adduct for the hydrosilylationreactions under the same conditions. Furthermore, the complexes also exhibited
Hydrosilylation catalysed by a rhodium complex in a supercritical CO2/ionic liquid system
作者:Jiayun Li、Jiajian Peng、Guodong Zhang、Ying Bai、Guoqiao Lai、Xiaonian Li
DOI:10.1039/c0nj00012d
日期:——
The hydrosilylation of alkenes in a supercritical CO2 (scCO2)/ionic liquid (IL) system was investigated. Rh(PPh3)3Cl exhibited excellent catalytic activity and selectivity. KOtBu was used as an additive, and no hydrogenation by-product (alkane) was detected in the scCO2/IL system. During hydrosilylation in the scCO2/IL system, the reactants were possibly transferred into the IL phase by scCO2, in which the catalyst was dissolved. The products can be flushed with scCO2 after the reaction and the catalyst/IL system reused.