An expedient access to chromanols via an arginine-mediated cascade cyclisation in water
作者:Ajit Kumar Jha、Heena Inani、Srinivasan Easwar
DOI:10.1016/j.tetlet.2018.05.015
日期:2018.6
efficient protocol for the synthesis of chromanols has been elaborated via an arginine-mediated cascade cyclisation reaction between salicylaldehyde and methyl vinyl ketone in water. Various substituted salicylaldehydes were successfully used in the aqueous based reaction, affording the chromanol adducts in very good yields. Mechanistically, the reaction presumably proceeds via an oxa-Michael addition
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%。