(Benzo[d]azolil)guanidinas: reações de ciclocondensação com trifluoracetil enol éteres na síntese de N-(pirimidinil)-1H-(benzo[d]azolil)aminas e N-derivados

Abstract

The present research describes a simple and efficient procedure to synthesize a novel series of twenty N-(pyrimidinyl)-1H-(benzo[d]azolyl)amines, from the cyclocondensation reaction of (benzo[d]azolyl)guanidines with 4-alkoxy-4-alkyl(aryl/heteroaryl)-1,1,1-trifluoroalk-3-en-2-ones and 2,2,2-trifluor-1-(2-methoxycyclohexen-1-en-1-yl)ethanone. The (benzo[d]azolyl)guanidines precursors were further obtained from reactions of cyanoguanidine with o-phenylenediamine or 2-aminothiophenol and the trifluoromethylated vinyl ketones from trifluoroacetylation of enolethers or acetals. The reactions were optimized for water as solvent and when were carried out in under reflux for 1 24 h allowed to isolate the respective N-(pyrimidinyl)-1H-(benzo[d]azolyl)amines in 60 to 90 % yields.