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%。
Catalytical promiscuity of α-amylase: Synthesis of 3-substituted 2H-chromene derivatives via biocatalytic domino oxa-Michael/aldol condensations
An facile and green one-pot route has been developed for the synthesis of chromenes using salicylaldehyde and alpha,beta-unsaturated ketones. alpha-Amylase from Bacillus subtilis shows excellent catalytic activity and exerts good adaptability to different substrates in the reaction. This promiscuous enzyme-catalyzed domino reaction not only extends the application of alpha-amylase from B. subtilis for new chemical transformations, but also provided an alternative synthetic method for 2H-chromene derivatives. (c) 2013 Elsevier B.V. All rights reserved.
Dérivés chromeniques à chaîne triénique, utilisables dans le traitement de l'ostéoporose et des affections inflammatoires