New Synthetic Approach for the Preparation of Imidazole<i>N</i>
<sup>3</sup>-Oxide
作者:Hugo Cerecetto、Mercedes González、Alejandra Gerpe、Yolanda Fernández Sainz、Oscar E. Piro、Eduardo E. Castellano
DOI:10.1055/s-2004-831212
日期:——
A new synthetic procedure of 1-alkyl(aryl)-1H-4-methylimidazole N 3 -oxide derivatives by cyclocondensation of α-amine-oximes and orthoesters was studied. Low yields in the cyclization process were the result of predominant Z-stereoisomer around the oxime moiety of α-amineoxime reactants. Different attempts to improve these yields were assayed, mild conditions being those that produce the best results