Process

Details Process Process

1976-03-31

1978-04-11

Trousof, Natalie

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D31116

Patent

active

040838579

ABSTRACT:
There is provided a process for the preparation of coumarin derivatives of the formula: ##STR1## (wherein R represents substituted or unsubstituted alkyl, aryl or aralkyl, R.sup.1 represents alkanoyl, and the hydroxy and R.sup.1 substituents are ortho to one another) in which a hydroxy-substituted coumarin of the formula: ##STR2## is acylated in the presence of a Friedel-Crafts catalyst. The compounds of formula I are intermediates in the preparation of certain pharmaceutically-active chromones.

REFERENCES:
patent: 3665013 (1972-05-01), Fitzmaurice et al.
Gore In: Olah, Friedel-Crafts and Related Reactions, vol. IV, Part I, Acylation and Related Reactions, p. 46, (1964).

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