期刊
CHEMISTRY-AN ASIAN JOURNAL
卷 14, 期 15, 页码 2694-2703出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.201900577
关键词
alkynes; cobalt; homogeneous catalysis; hydrosilylation; regioselectivity
资金
- National Natural Science Foundation of China [21672045, 21871068]
- China Postdoctoral Science Foundation [2016M591519]
- Heilongjiang Postdoctoral Foundation [LBH-Z16069]
- National Natural Science Foundation of Heilongjiang [B2018005, LC2018005]
Several cobalt complexes bearing tridentate (NNN) ligands were synthesized and served as precatalysts for alkyne hydrosilylation with Ph2SiH2. For terminal alkynes, the catalyst L2 b-CoCl2 was selected, and resulted in the corresponding alpha-vinylsilanes with high (Markovnikov) regioselectivity and extensive functional-group tolerance. For internal diaryl alkynes, the catalyst L2 c-CoCl2 exhibited the best activity, and afforded E-selective vinylsilanes through syn-addition in excellent yield under mild conditions.
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