One-Pot Cascade Reactions Leading to Pyrido[2′,1′:2,3]imidazo[4,5-c][1,2,3]triazolo[1,5-a]quinolines under Bimetallic Relay Catalysis with Air as the Oxidant

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• 作者：Ze Wang ; Bin Li ; Xinying Zhang ; Xuesen Fan
• 刊名：Journal of Organic Chemistry
• 出版年：2016
• 出版时间：August 5, 2016
• 年：2016
• 卷：81
• 期：15
• 页码：6357-6363
• 全文大小：428K
• 年卷期：0
• ISSN：1520-6904

文摘

In this paper, we report an efficient one-pot synthesis of 1,2,3-triazole/quinoline-fused imidazo[1,2-a]pyridines starting from 2-(2-bromophenyl)imidazo[1,2-a]pyridines, alkynes, and sodium azide. This novel method involves a one-pot bimetallic relay-catalyzed cascade process combining azide–alkyne cycloaddition, C–N coupling between 1,2,3-triazole and aryl bromide, and intramolecular cross dehydrogenative C–C coupling between 1,2,3-triazole and imidazo[1,2-a]pyridine. Notable features of this protocol include simple starting materials, sustainable oxidants, reduced synthetic steps, and high efficiency.