Synthesis of Fused Imidazoles and Benzothiazoles from (Hetero)Aromatic <i>ortho</i>-Diamines or <i>ortho</i>-Aminothiophenol and Aldehydes Promoted by Chlorotrimethylsilane
作者:Dmitriy Volochnyuk、Sergey Ryabukhin、Andrey Plaskon、Andrey Tolmachev
DOI:10.1055/s-2006-950289
日期:2006.11
New convenient conditions for benzimidazole and benzothiazole syntheses are described. A set of benzimidazoles, 3H-imidazo[4,5-b]pyridines, purines, xanthines and benzothiazoles was readily prepared from (hetero)aromatic ortho-diamines or ortho-aminothiophenol and aldehydes using chlorotrimethylsilane in DMF as a promoter and water-acceptor agent, followed by oxidation with air oxygen.
描述了苯并咪唑和苯并噻唑合成的新便利条件。一组苯并咪唑、3H-咪唑并[4,5-b]吡啶、嘌呤、黄嘌呤和苯并噻唑很容易由(杂)芳族邻二胺或邻氨基苯硫酚和醛在 DMF 中使用三甲基氯硅烷作为促进剂和水受体制备剂,然后用空气氧氧化。