作者:Oleksandr Grygorenko、Pavel Mykhailiuk、Vadym Levterov、Andrey Tolmachev
DOI:10.1055/s-0030-1258470
日期:2011.4
An expedient approach to the difluoromethylation of imidazoles and benzimidazoles has been developed. The key feature of the procedure is the gradual generation of the difluoromethylation reagent in the reaction mixture, which is achieved by the simultaneous addition of chlorodifluoromethane and alkali. The method is applicable to functionalized substrates and allows the corresponding 1-(difluoromethyl)imidazoles and -benzimidazoles to be prepared in 60-95% yield on a hundred-gram scale.
一种用于咪唑和苯并咪唑二氟甲基化的便捷方法已经开发出来。该方法的关键特征是反应混合物中二氟甲基化试剂的逐渐生成,这是通过同时添加二氟氯甲烷和碱来实现的。该方法适用于官能化底物,并允许以百克级规模制备相应的1-(二氟甲基)咪唑和-苯并咪唑,收率可达60-95%。