PROCESS FOR PREPARING HYDROXYBENZOCYCLOBUTENES

摘要

2116125 9306072 PCTABS00021 A process for preparing a 3- or 4-hydroxybenzocyclobutene comprises reacting a 3- or 4-halobenzocyclobutene reactant with an alkali metal hydroxide by heating in an aqueous alcohol medium at a temperature from about 50 ·C to a temperature at which dimerization or oligomerization of a benzocyclobutene reactant or product is a significant side reaction, in the presence of a catalyst containing a catalytic amount of elemental copper or a copper compound, for a time sufficient to convert the halobenzocyclobutene reactant to the hydroxybenzocyclobutene product.