PROCESS FOR PREPARATION OF ALPHA-HYDROXY-BENZENEACETIC ACID DERIVATIVES, AND PROCESS FOR PREPARATION OF COMPOUND HAVING TWO 5-MEMBERED LACTONE RINGS FUSED TO CENTRAL CYCLOHEXA-1,4-DIENE NUCLEUS USING THE SAME

摘要

The invention cyclohexadiene-1, 4-diene-5 to the matrix in two essential raw materials for the production of compounds with a ring lock tonring alpha of formula - provides a process for the production of hydroxy-benzene acetic acid derivative. According to the method of the present invention, using a highly toxic substance, or without toxic substances it is not by-product can be easily produced the above compound in high purity and yield.; Wherein A, D ₁ and R ₁ are as defined in the specification.