2-amino-X-nitrobenzimidazoles as precursors of food-borne carcinogens: A new approach to IQ synthesis
作者:Maroš Bella、Viktor Milata、Lyudmila I. Larina
DOI:10.1002/jhet.786
日期:2012.3
(non)‐methylated nitro‐o‐phenylenediamines with cyanogen bromide provided nitro‐substituted 2‐aminobenzimidazoles in good up to excellent yields. Catalytic hydrogenation of 2‐amino‐1‐methyl‐5‐nitrobenzimidazole yielded 2,5‐diamino‐1‐methylbenzimidazole, which on treatment with 1,1,3,3‐tetramethoxypropane in methanol and subsequently after removal of methanol in polyphosphoric acid afforded food‐borne
用溴化氰将(非)甲基化的硝基邻苯二胺环化,可以很好地获得硝基取代的2-氨基苯并咪唑,而且产率很高。2-氨基-1-甲基-5-硝基苯并咪唑的催化加氢反应生成2,5-二氨基-1-甲基苯并咪唑,经1,1,3,3-四甲氧基丙烷的甲醇溶液处理,随后在多磷酸中除去甲醇后得到食源性致癌物2-氨基-3-甲基咪唑并[4,5- f ]喹啉(IQ),产率20%。J.杂环化学。,(2011)。