Factors Affecting Migration of Tertiary Alkyl Groups in Reactions of Alkylboronic Esters with Bromomethyllithium
作者:Mark C. Elliott、Keith Smith、D. Heulyn Jones、Ajaz Hussain、Basil A. Saleh
DOI:10.1021/jo4000459
日期:2013.4.5
be of great potential for the formation of quaternary carbon centers but often give poor yields/conversions. Calculations and experimental evidence show that tert-alkyl groups migrate less effectively than other types of alkylgroup in such reactions and that O-migration competes. Furthermore, slow/incomplete capture of the bromomethyl reagent by the boronic ester is a problem in more hindered systems