Process for making 2-alkyl-3-hydroxybenzoic acids

摘要

A two step process is described for making 2-alkyl-3-hydroxybenzoic acids or derivatives of benzoic acids by first reacting an allenyl ester or equivalent with furan followed by the ring-opening reaction of the derived bicyclo intermediate with base. The benzoic acids thus prepared are useful intermediates for the preparation of agricultural and pharmaceutical materials.