An expeditious one-pot multicomponent synthesis of sterically hindered bis-1,2,4-triazolopyridazines under solvent-free conditions
作者:Ranjana Aggarwal、Mamta、Garima Sumran
DOI:10.24820/ark.5550190.p011.009
日期:——
6-disubstituted-bis-1,2,4-triazolo-[4,3-b:3',4'f]pyridazines was accomplished via a three-component reaction sequence between 3,6-dihydrazinopyridazine, an aromatic or heteroaromatic aldehyde and iodobenzene diacetate (IBD) on grinding at room temperature. The 3,6-bis-arylidenehydrazinopyridazine intermediates, generated in situ, undergo oxidative cyclization to afford the title compounds. The present protocol
空间位阻 3,6-二取代-双-1,2,4-三唑并-[4,3-b:3',4'f]哒嗪的简单且生态简便的合成是通过三组分反应序列完成的3,6-二肼基哒嗪,一种芳香族或杂芳香族醛和碘苯二乙酸酯 (IBD) 在室温下研磨。原位生成的 3,6-双亚芳基肼基哒嗪中间体经过氧化环化得到标题化合物。本协议收率高,反应时间短,底物范围广,是一种无溶剂绿色合成,产品易于纯化。