Organobase-catalyzed Mannich reaction of cyclic N-sulfonyl imines and 1,2-diketones: A sustainable approach to 4-(3-arylquinoxalin-2-ylmethyl)sufamidates
作者:Poonam Rani、Meher Prakash、Sampak Samanta
DOI:10.1016/j.tetlet.2023.154490
日期:2023.6
A convenient, eco-friendly, organobase-catalyzed one-pot two-step sequential approach to a fascinating class of various 4-(3-arylquinoxalin-2-ylmethyl)-substituted sulfamidates in good to high yields is reported. This CC/CN bond-forming reaction proceeds via a Mannich reaction of cyclic N-sulfonyl aldimines with 1-aryl-2-alkyl-1,2-diketones catalyzed by triethylamine, followed by the aza-cyclization
报道了一种方便、环保、有机碱催化的一锅两步顺序方法,以良好到高产率生产一类迷人的各种 4-(3-arylquinoxalin-2-ylmethyl)-取代的磺酰胺。这种 C C/C N 键形成反应通过环状N -磺酰醛亚胺与 1-aryl-2-alkyl-1,2-二酮在三乙胺催化下的曼尼希反应进行,然后原位形成 1 的氮杂环化,2-二羰基前体与PEG-400 中的邻二氨基芳烃在室温下作为天然、可重复使用的良性溶剂。此外,这种 100% 碳原子经济的方法对于克级合成是可行的,并且在温和条件下可以容忍各种合成足智多谋的功能。