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ChemInform Abstract: Preparation of 1,2-Disubstituted-3-hydroxy-4(1H)-quinolinones and the Influence of Substitution on the Course of Cyclization.

✍ Scribed by Pavel Hradil; Jan Hlavac; Karel Lemr

Publisher: John Wiley and Sons
Year: 2010
Weight: 29 KB
Volume: 30
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.199926145

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✦ Synopsis

Preparation of 1,2-Disubstituted-3-hydroxy-4(1H)-quinolinones and the Influence of Substitution on the Course of Cyclization.

-The synthesis of the title quinolinones (IV) by cyclization of N-substituted anthranilates (III) in moderate to good yields is described. The PPA-induced cyclization has a wide scope of applicability whilst the application of the thermal cyclization is limited by steric effects.

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