| 摘要 |
<p>A process for the preparation of formula (1): wherein R is alkyl or aryl, cyclic or acyclic, substituted or unsubstituted, and optionally containing one or more oxygen, nitrogen or sulphur heteroatoms; comprising reacting resorcinol with an alkanoic carboxylic acid in the presence of a Lewis acid or a Bronsted acid catalyst, wherein the mole ratio of the acid catalyst to resorcinol is at least one and the mole ratio of alkanoic acid to resorcinol is at least two.</p> |
