New electronically enriched boronobutadienes for the synthesis of hydroxylated cyclohexenes via tandem [4+2]/allylboration
作者:Xuri Gao、Dennis G. Hall
DOI:10.1016/s0040-4039(03)00164-3
日期:2003.3
describes the preparation and behavior of ether-substituted 1-boronobutadienes 1 and 2 in the Vaultier tandem [4+2]/allylboration three-component reaction involving electron-poor dienophiles and aldehydes. Whereas diene 1 failed to undergo the second, allylboration step of this process, diene 2 reacted with maleimides to give products 12, and even reacted with moderately activated dienophiles such as acrylates