Synthesis of new N-heteroaryl derivatives of 4-pyrones from kojic acid based Baylis–Hillman acetates
作者:Z. Ghasemi、M. Eshtad、F. Poorhossain Mejarshin
DOI:10.1007/s10593-013-1188-2
日期:2013.2
A series of kojic acid benzyl ether derivatives possesing imidazole, benzimidazole, and pyrazole rings were synthesized by SN2'-substitution of these heterocycles using prepared Baylis–Hillman acetates.
Synthesis of fused pyrimidone derivatives of 4-pyrones from the acetates of Baylis–Hillman adducts
作者:A. Shahrisa、Z. Ghasemi
DOI:10.1007/s10593-010-0466-5
日期:2010.5
A series of fused pyrimidone derivatives of 4-pyrones was synthesized by conversion of the acetates of Baylis−Hillman adducts obtained from 2-formyl-4-pyrones with 2-aminopyridine and 2-aminothiazole.
Oxidative aza Michael addition of nitrogen-containing heterocycles to kojic acid-derived Baylis-Hillman adducts
作者:Zarrin Ghasemi、Hasan Kalantar Esfangare
DOI:10.1515/hc-2014-0197
日期:2015.2.1
Abstract
The oxidation of Baylis-Hillman adducts, obtained by the reaction of 5-benzyloxy-2-formyl-4-pyrone, with o-iodoxybenzoic acid generates β-ketomethylene intermediates that in situ undergo conjugative attack of NH-containing heterocycles such as imidazole and pyrazoles.