Abstract

We report a novel and efficient approach to the synthesis of imidazo[1,5-a]pyridine-1-carboxylic acids. By using the reaction of 2-(aminomethyl)pyridine with acyl chlorides followed by one-pot treatment with trifluoroacetic anhydride, 2,2,2-trifluoro-1-imidazo[1,5-a]pyridin-1-ylethanones were obtained, which were then converted into imidazo[1,5-a]pyridine-1-carboxylic acids in high preparative yields through haloform cleavage.

We report a novel and efficient approach to the synthesis of imidazo[1,5-a]pyridine-1-carboxylic acids. By using the reaction of 2-(aminomethyl)pyridine with acyl chlorides followed by one-pot treatment with trifluoroacetic anhydride, 2,2,2-trifluoro-1-imidazo[1,5-a]pyridin-1-ylethanones were obtained, which were then converted into imidazo[1,5-a]pyridine-1-carboxylic acids in high preparative yields through haloform cleavage.

中文翻译：

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咪唑并[1,5-a]吡啶-1-羧酸的高效制备

摘要

我们报告了一种新型的合成咪唑并[1,5 - a ]吡啶-1-羧酸的有效方法。通过使2-（氨基甲基）吡啶与酰氯反应，然后用三氟乙酸酐一锅处理，得到2,2,2-三氟-1-咪唑并[1,5 - a ]吡啶-1-丙酮酮，然后通过卤代形式裂解以高制备产率将其转化为咪唑并[1,5 - a ]吡啶-1-羧酸。

我们报告了一种新型的合成咪唑并[1,5 - a ]吡啶-1-羧酸的有效方法。通过使2-（氨基甲基）吡啶与酰氯反应，然后用三氟乙酸酐一锅处理，得到2,2,2-三氟-1-咪唑并[1,5 - a ]吡啶-1-丙酮酮，然后通过卤代形式裂解以高制备产率将其转化为咪唑并[1,5 - a ]吡啶-1-羧酸。