期刊
ACS CATALYSIS
卷 8, 期 7, 页码 5896-5900出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.8b01410
关键词
cobalt; hydrosilylation; alkynes; vinylsilanes; homogeneous catalysis
资金
- Ministry of Education of Singapore [R-143-000-A07-112]
We report a regioselective and stereoselective hydrosilylation of terminal alkynes 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 terminal alkynes underwent this cobalt-catalyzed hydrosilylation, affording the corresponding (E)-vinylsilanes in high yields with high regioselectivity and stereoselectivity. These reactions show good functional group compatibility and can be readily scaled up to gram-scales without using a drybox. Deuterium-labeling experiments suggest a cis-addition of hydrosilanes to alkynes.
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