Cobalt‐Catalyzed Alkyne Hydrosilylation and Sequential Vinylsilane Hydroboration with Markovnikov Selectivity. Issue 36 (1st August 2016)

• Record Type: Journal Article
• Authors: Zuo, Ziqing; Yang, Ji; Huang, Zheng
• Is Part Of: Angewandte Chemie international edition. Volume 55:Issue 36(2016)
• Page Start: 10839
• Page End: 10843
• Publication Date: 2016-08-01
• Subjects: alkynes -- cobalt -- hydroboration -- hydrosilylation -- vinylsilanes; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201605615
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: A pyridinebis(oxazoline) cobalt complex is a very efficient precatalyst for the hydrosilylation of terminal alkynes with Ph2 SiH2, providing α‐vinylsilanes with high (Markovnikov) regioselectivity and broad functional‐group tolerance. The vinylsilane products can be further converted into geminal borosilanes through Markovnikov hydroboration with pinacolborane and a bis(imino)pyridine cobalt catalyst. Abstract : Terminal alkynes can be converted into α‐vinylsilanes in a cobalt‐catalyzed Markovnikov alkyne hydrosilylation reaction with Ph2 SiH2 . The reaction products were further transformed into novel geminal borosilanes in a cobalt‐catalyzed hydroboration process, also with Markovnikov selectivity.