Alkylation of 4-Hydroxycoumarins by Ketone Mannich Bases. Synthesis of 4-Hydroxy-2-oxo-3-(3-oxoalkyl)-2H-1-benzopyrans

DOI: 10.1055/s-1985-31376

Source and publish data:

Synthesis p. 894 - 896 (1985)

Update date:2022-08-05

Topics:

Authors:

Bravo, Pierfrancesco

Ticozzi, Calimero

Cavicchio, Giancarlo

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Article abstract of DOI:10.1055/s-1985-31376

The reaction of 4-hydroxycoumarins with 2-dimethylaminoethyl ketones or with dimethylamine + vinyl ketones affords 4-hydroxy-2-oxo-3-(3-oxoalkyl)-2H-1-benzopyrans which undergo carbonyl olefination with methylenetriphenylphosphorane to give 3-(3-butenyl)-

Full text of DOI:10.1055/s-1985-31376

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