Iron(III) Chloride-Catalyzed Decarboxylative-Deaminative Functionalization of Phenylglycine: A Tandem Synthesis of Quinazolinones and Benzimidazoles
作者:Manoranjan Kumar、Richa、Sushila Sharma、Vinod Bhatt、Neeraj Kumar
DOI:10.1002/adsc.201500335
日期:2015.9.14
present reaction conditions. In this tandem approach, involvement of transfer hydrogenation of the nitro functionality with in situ generated ammonia, imination, nitrile hydration to amide and oxidative cyclization sequences have been established. The process avoids the use of an external hydrogen source, costly catalysts as well as the isolation of amine and amide intermediates.
通过邻位取代的硝基芳烃,首次实现了铁(III)氯化铁催化的苯甘氨酸的脱羧脱氨基官能化反应,从而合成了4(3 H)-喹唑啉酮和苯并咪唑。在甲苯中以碳酸钾为碱存在下,于120°C下,2-硝基苯甲腈/ 2-硝基N,N-二苯胺与苯基甘氨酸反应生成的产物收率为45-87%。在本反应条件下,各种官能团如硝基,氟,氯和三氟甲基被很好地耐受。在这种串联方法中,涉及硝基官能团的转移氢化与原位反应已经确定了生成的氨,亚胺化,腈水合成酰胺和氧化环化顺序。该方法避免了使用外部氢源,昂贵的催化剂以及胺和酰胺中间体的分离。