A porousorganicpolymer (POL-Xantphos) was synthesized and employed as a heterogeneous ligand for selective hydrosilylation of alkynes. It exhibits high selectivity and catalytic efficiency toward a broad range of alkynes. Owing to the confinement effect of the micropore structure, POL-Xantphos was far superior to the monomeric Xantphos ligands in controlling the selectivity. By performing hydrosilylation
Cobalt-Catalyzed (<i>E</i>)-Selective<i>anti</i>-Markovnikov Hydrosilylation of Terminal Alkynes
作者:Caizhi Wu、Wei Jie Teo、Shaozhong Ge
DOI:10.1021/acscatal.8b01410
日期:2018.7.6
regioselective and stereoselective hydrosilylation of terminalalkynes with catalysts generated from bench-stable Co(acac)2 and bisphoshpine ligands. The cobalt catalyst precursors are activated by the reaction with hydrosilanes, and air-sensitive activators, such as Grignard reagents or NaBHEt3, are not required for catalyst activation. A wide range of aromatic and aliphatic terminalalkynes underwent this
A Co(acac)2/POL‐Xantphos@10PPh3‐catalyzed hydrosilylation of unsymmetrical internal alkynes with Ph2SiH2 has been developed for the synthesis of highly selective syn‐α‐vinylsilane products. Furthermore, terminal alkynes were also used and gave the products with excellent regioselectivity and a wide functional group tolerance. Because this porous organic polymer combines the selectivity and activity