Hypervalent Iodine‐Mediated Synthesis of 1‐Aryl‐4‐methyl‐1,2,4‐triazolo[4,3‐a]quinoxalines by Oxidative Cyclization of Arene Carbaldehyde‐3‐methylquinoxalin‐2‐yl Hydrazones
作者:Ranjana Aggarwal、Garima Sumran
DOI:10.1080/00397910600602586
日期:2006.7
Abstract Arene carbaldehyde‐3‐methylquinoxalin‐2‐yl hydrazones (2) obtained by the condensation of 2‐hydrazino‐3‐methylquinoxaline (1) with various aromatic aldehydes, on treatment with iodobenzene diacetate (IBD) in dichloromethane, undergo oxidative cyclization to exclusively afford 1‐aryl‐4‐methyl‐1,2,4‐triazolo[4,3‐a]quinoxalines (5) in excellent yield.
摘要 芳烃甲醛-3-甲基喹喔啉-2-基腙(2) 由2-肼基-3-甲基喹喔啉(1) 与各种芳香醛缩合得到,在二氯甲烷中用碘苯二乙酸酯(IBD) 处理,经过氧化环化得到以优异的收率独家提供 1-芳基-4-甲基-1,2,4-三唑并[4,3-a]喹喔啉 (5)。