We report herein the silver-catalyzed cycloisomerization of readily available N-(prop-2-yn-1-yl)pyridine-2-amines as a new and practical method for the synthesis of differently substituted 3-methylimidazo[1,2-a]pyridines. The isomerization reactions proceeded under mild reactions conditions to give good yields and excellent regioselectivity. A DFT-based mechanistic analysis is also reported.

中文翻译：

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N-(Prop-2-yn-1-yl)pyridin-2-amines 的银催化环化

我们在此报告了银催化的易于获得的 N-(prop-2-yn-1-yl)pyridine-2-amines 的环异构化作为合成不同取代的 3-methylimidazo[1,2-a ]吡啶。异构化反应在温和的反应条件下进行，具有良好的产率和优异的区域选择性。还报告了基于 DFT 的机械分析。