4.7 Article

A One-Step Synthesis of 2,4-Unsubstituted Quinoline-3-carboxylic Acid Esters from o-Nitrobenzaldehydes

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JOURNAL OF ORGANIC CHEMISTRY
卷 75, 期 10, 页码 3488-3491

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AMER CHEMICAL SOC
DOI: 10.1021/jo100392x

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A straightforward and efficient one-step procedure for the synthesis of 2,4-unsubstituted quinoline-3-carboxylic acid ethyl esters is described, The simple reductive cyclization is carried out by treating various substituted o-nitrobenzaldehydes with inexpensive, commercially available 3,3-diethoxypropionic acid ethyl ester and SnCl(2)center dot 2H(2)O in refluxing ethanol.

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