Limitations of the 'Two-Phase' Doebner-Miller Reaction for the Synthesis of Quinolines
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The Doebner-Miller synthesis of quinolines under modified biphasic conditions was investigated. Crotonaldehyde, reacted readily with aniline to produce 2-methylquinoline. However, cinnamaldehyde and other ?-substituted a,߭unsaturated aldehydes yielded complex mixtures with substituted anilines to provide only trace quantities of quinolines. The Doebner-Miller reaction under these conditions is only suitable for sterically accessible a,߭unsaturated aldehydes.
Copyright 2010 Georg Thieme Verlag. This is the author-manuscript version of the paper. Reproduced in accordance with the copyright policy of the publisher. The definitive version is available at www.thieme-connect.com
Organic Chemical Synthesis