作者:Punit P. Seth、Dale E. Robinson、Elizabeth A. Jefferson、Eric E. Swayze
DOI:10.1016/s0040-4039(02)01754-9
日期:2002.10
imidazole ring system was assembled using SNAr reactions, nitro group reduction, acylthiourea formation and cyclization with EDC. The acyl protected 2-aminobenzimidazole derivatives were obtained in high yield and purity without purification of intermediates or final products. This reaction sequence eliminates the use of highly toxic cyanogen bromide, a reagent commonly used to prepare the 2-aminobenzimidazole
报道了用于合成2-(N-酰基)-氨基苯并咪唑的有效溶液相方案。2-(Ñ酰基) -氨基苯并咪唑环体系使用S-组装Ñ的Ar反应,硝基还原,酰基硫脲的形成和环化用EDC。以高收率和纯度获得酰基保护的2-氨基苯并咪唑衍生物,而无需纯化中间体或最终产物。该反应序列消除了使用剧毒的溴化氰,一种通常用于制备2-氨基苯并咪唑环系统的试剂。