A Facile Construction of 6-(Arylmethyl)imidazo[1,2-<i>a</i>]pyrimidin-7-ylamines from Allylamines Derived from Baylis-Hillman Adducts
作者:Somnath Nag、Amita Mishra、Sanjay Batra
DOI:10.1002/ejoc.200800448
日期:2008.9
A facile and convenient synthesis of substituted imidazo[1,2-a]pyrimidin-7-ylaminesfrom the allylamine derivatives afforded by the Baylis–Hillman acetates of substituted benzaldehydes and heterocyclic aldehydes by treatment with cyanamide is described. Interestingly, the allylamines afforded by heterocyclic aldehydes, which undergo fast Baylis–Hillman reaction, were discovered to undergo a one-pot
The synthesis of several 1-(2-cyano-3-aryl-allyl)-3-aryl-urea(thiourea) constructed from the reaction between allylamines generated from Baylis-Hillman acetates and substituted isocyanates and isothiocyanates has been described. Further, their cyclization in the presence of a base led to the formation of 5-arylmethyl-4-imino-3-aryl-3,4-dihydro-1H-pyrimidin-2-ones. All compounds were tested for their antibacterial activity. Few of the compounds showed superior activity or were equipotent to the standard antibacterial agents. (c) 2006 Elsevier Ltd. All rights reserved.