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The synthesis and chemistry of functionalized furochromones.4.1 Addition of nitronate anions to 30bromochromone and 6-bromofurochromone. An expedient route to furo(3′,2′:6,7)-benzopyrano(2,3-d)-isoxazolones and chromono(2,3-d)isoxazolones.

✍ Scribed by Ronald B. Gammill; Sharon A. Nash; Larry T. Bell; William Watt

Publisher: Elsevier Science
Year: 1992
Tongue: French
Weight: 245 KB
Volume: 33
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)91842-2

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✦ Synopsis

Addition of nitronate anions to 3-bromochromone 1 and 6bromofurcchoromone 2 results in the efficient generation of 3-hydroxy-2-(l-(hydroxyimino)alkyl,aryl or carboalkoxy) substituted chromones and the corresponding 6,7-disubstitutod furochromones. These compounds are efficiently converted to furo(3',2': 6,7Xxmzopyrano(2,3-d)isoxazoles and chromono(2,3-d)isoxazoles, respectively, with N,N-dimethylformamide dimethylacetal (DMF'-DMA).

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