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Reactions of 3-triphenylphosphoranylidene-[b]fused furan-2(3H)-ones with some salicylaldehydes: new synthesis of 3-(2-hydroxyaryl)-coumarins and coumestans

✍ Scribed by Litinas, K. E.; Stampelos, X. N.


Book ID
121801843
Publisher
Royal Society of Chemistry
Year
1992
Weight
517 KB
Volume
21
Category
Article
ISSN
1472-7781

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## Abstract 3‐Acetylcoumarine was condensed with dimethylformamide dimethylacetal (DMFDMA) to yield the enaminone, which reacts readily with hydroxylamine and with hydrazines to yield coumarin‐3‐ylisoxazoles and coumarin‐3‐ylpyrazoles respectively. Reaction of the enaminone with benzamidine hydroch