Convenient Synthesis of 2,2′- and 4,4′-Methylenebisphenols with Bulky Alkyl Substituents and Evaluation of Their Antioxidant Activity
摘要:
The work is devoted to a convenient procedure of the synthesis of 2,2'- and 4,4'-methylenebisphenols with alkyl substituents in heterogeneous catalysis. This compounds were obtained with yields up to 87% by reflux of 2,4- or 2,6-dialkylphenols with HCHO in n-octane in the presence of KSF clay. We found that the antioxidant activity on DPPH test for two novel methylenebisphenols having isobornyl fragments was comparable with control drugs.