Protodeboronation of Tertiary Boronic Esters: Asymmetric Synthesis of Tertiary Alkyl Stereogenic Centers
作者:Stefan Nave、Ravindra P. Sonawane、Tim G. Elford、Varinder K. Aggarwal
DOI:10.1021/ja1084207
日期:2010.12.8
tertiary boranes undergo efficient protodeboronation with carboxylic acids, tertiary boronicesters do not. Instead, we have discovered that CsF with 1.1 equiv of H2O (on tertiary diarylalkyl boronicesters) or TBAF·3H2O (on tertiary aryldialkyl boronicesters) effect highly efficient protodeboronation of tertiary boronicesters with essentially complete retention of configuration. Furthermore, substituting
Cu‐Catalyzed Coupling of Aliphatic Amines with Alkylboronic Esters
作者:Francesca M. Dennis、Antonio Romero Arenas、George Rodgers、Muralidharan Shanmugam、Jonathan A. Andrews、Samantha L. Peralta‐Arriaga、Benjamin M. Partridge
DOI:10.1002/chem.202303636
日期:2024.4.2
We report the Cu-catalysed coupling of alkylboronic esters and aliphaticamines. This mild method is functional group tolerant, and uses O2 from air as the terminal oxidant. Investigation into the mechanism suggest that the boronic ester reacts with an aminyl radical, formed in situ, to generate an alkyl radical intermediate.