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。