Synthesis of imidazoles by the oxidative transformation of 5-aminopyrimidinones
Abstract
2-Alkoxy-1H-imidazoles (2a–f, 3a, b, 4a, b) were synthesized from 5-aminopyrimidin-4(3H)-ones 1a–d by treatment with oxidative metal salts (CuII, TIII, FeIII, PbIV) in alkyl alcohols. Oxidative transformation of 5-aminouracils 5a–c by thallium(III) nitrate trihydrate in methanol gave gem-diols 6a–c, which were rearranged to imidazolones 7a–c.