Application of Baylis–Hillman methodology in a chemoselective synthesis of 3-acyl-2H-1-chromenes
作者:Perry T. Kaye、Xolani W. Nocanda
DOI:10.1039/b001148g
日期:——
Reaction of 2-hydroxybenzaldehydes with alkyl vinyl ketones in the presence of 1,4-diazabicyclo[2.2.2]octane proceeds with regioselective cyclisation to afford the corresponding 2H-1-chromenes in yields of up to 87%.
2-羟基苯甲醛与烷基乙烯基酮在乙腈存在下的反应 1,4-二氮杂双环[2.2.2]辛烷 进行区域选择性 环化可以得到相应的2 H -1-苯甲基,收率可达87%。
A convenient general synthesis of 3-substituted 2H-chromene derivatives
作者:Perry T Kaye、Xolani W. Nocanda
DOI:10.1039/b201827f
日期:2002.5.10
Reactions of 2-hydroxybenzaldehydes and 2-hydroxy-1-naphthaldehydes with various activated alkenes under Baylis–Hillman conditions have been shown to proceed with regioselective cyclisation to afford the corresponding 3-substituted chromene derivatives. In some cases competitive dimerisation of the alkene component was observed, and direct dimerisation in the absence of the aldehyde has been explored.