Rhodium(III)-Catalyzed Directed C−H Amidation of <i>N</i>
-Nitrosoanilines and Subsequent Formation of 1,2-Disubstituted Benzimidazoles
作者:Yanyu Chen、Rong Zhang、Qiujun Peng、Lanting Xu、XianHua Pan
DOI:10.1002/asia.201701287
日期:2017.11.2
An efficient rhodium‐catalyzed direct C−H amidation of N‐nitrosoanilines with 1,4,2‐dioxazol‐5‐ones as amidating agents has been developed. This method featured mild reaction conditions, a wide substrate scope and satisfactory yields. Besides, the amidated products could be readily converted to pharmaceutically valuable 1,2‐disubstituted benzimidazoles via an HCl‐mediated deprotection/cyclization process
已经开发了一种高效的铑催化的N-亚硝基苯胺的直接CH H酰胺化反应,使用1,4,2-二恶唑5-1作为酰胺化剂。该方法的特点是反应条件温和,底物范围广且产率令人满意。此外,酰胺化的产品可以在一个锅中通过HCl介导的脱保护/环化过程轻易地转化为具有药用价值的1,2-二取代的苯并咪唑。