Photocatalytic Alkyl Radical Addition Tandem Oxidation of Alkenyl Borates
作者:Yu-Jie Li、De-Guang Liu、Jin-Hu Ren、Tian-Jun Gong、Yao Fu
DOI:10.1021/acs.joc.2c02923
日期:——
Photocatalytic oxidation is a popular transformation way for organic synthesis and is widely applied in academia and industry. Herein, we report a blue light-induced alkylation–oxidation tandemreaction for the synthesis of diverse ketones by combining alkyl radical addition and oxidation of alkenyl borates. This reaction shows excellent functional group compatibility in acceptable yields, and diversity
Asymmetric synthesis of chiral, nonracemic dialkyl-α-, β-, and γ-hydroxyalkylphosphonates via a catalyzed enantioselective catecholborane reduction
作者:Chris Meier、Wolfgang H.G. Laux
DOI:10.1016/0957-4166(95)00132-9
日期:1995.5
A highly enantioselective synthesis of dialkyl alpha-hydroxyphosphonates achieved by a oxazaborolidine catalyzed reduction with catecholborane starting with m-ketophosphonates is described. Both alpha-aryl- and alpha-alkylketophosphonates were reduced using the (S)-enantiomer of the catalyst 4 leading also to the (S)-configuration in the products 2. The reaction gave good chemical yields and excellent enantiomeric excesses (up to >99 % ee).