Directive effects in the hydroboration of 1-alkenyl derivatives of o-carborane with representative hydroborating agents
作者:G.W. Kabalka、G. Hondrogiannis
DOI:10.1016/s0022-328x(96)06695-8
日期:1997.5
A series of 1-alkenyl-o-carboranes was hydroborated using representative hydroborating agents with different steric requirements. The steric and electronic effects of the carboranyl group were evaluated by examining the distribution of the isomeric alcohols obtained after oxidation of the intermediate carboranyl-substituted organoboranes.
Nickel-catalyzed cross-coupling of sterically hindered 1-bromomethyl-o-carborane with alkyl and aryl Grignard reagents
作者:Juyou Lu、Hong Wan、Yunna Xue、Yongmei Du、Jian Lu
DOI:10.1016/j.tet.2015.08.022
日期:2015.10
A convenient and efficient Ni-catalyzed reaction has been developed for synthesis of mono-substituted o-carboranes, involving cross-coupling of readily available and stericallyhindered 1-bromomethyl-o-carborane with various alkyl and aryl Grignardreagents under mild conditions, and the corresponding o-carborane derivatives were obtained in good to excellent yields. This method should provide a new