Copper-catalyzed regioselective hydroboration of terminal alkynes in aqueous medium
作者:Zi-Jian Yao、Shibin Hong、Wei Zhang、Mengyan Liu、Wei Deng
DOI:10.1016/j.tetlet.2016.01.049
日期:2016.2
A mild and environment-friendly copper-catalyzed hydroboration of terminalalkynes in aqueous medium was reported. Regioselectivity control was achieved in the presence of cyclodextrin–bispyridine ligand (CD-1). This protocol was successfully applied to inactivated terminalalkynes. Moreover, the ligand was recovered and reused without any loss of activity over five cycles.
Copper(<scp>ii</scp>)-catalyzed protoboration of allenes in aqueous media and open air
作者:Russell F. Snead、Jan Nekvinda、Webster L. Santos
DOI:10.1039/d0nj02010a
日期:——
A method has been developed for the facile Cu(II)-catalyzed protoboration of monosubstituted allenes in aqueous media under atmospheric conditions. The reaction occurs site selectively, favoring internal alkene protoboration to afford 1,1-disubstituted vinylboronic acid derivatives (up to 93 : 7) with modest to good yields. The method has been applied to a variety of phenylallene derivatives as well