Bridged bis-(4,6-dialkyl phenol) prodn - from phenol reacted with excess acetal

摘要

Bridged bis(4,6-dialkylphenol)cpds. (I) are produced by reaction of 2,4-dialkylphenols with excess acetal in presence of acid catalyst. (I) are stabilisers for polymers. Process gives high yields (97-98%), is simple does not require water in reaction medium and avoids pollution.