Process for preparing benzyl substituted phenols, dibenzylphenolic compounds, and the antioxidant use of such phenols
申请人:ETHYL CORPORATION
公开号:EP0186255A2
公开(公告)日:1986-07-02
Phenols having an unsubstituted ortho-or para-position may be benzylated by reaction with a benzyl alcohol in contact with an activated alumina catalyst, especially gamma-alumina, at a temperature sufficient to maintain the reactants in the vapor phase. Particularly disclosed are 2, 5-dibenzyl-4-substituted phenols which are optionally substituted in the 3 and 5 positions. The 2, 6-dibenzyl-4- substituted compounds show good antioxidant activity
具有未取代的正位或对位的苯酚可以通过与活化氧化铝催化剂(尤其是γ-氧化铝)接触的苄醇反应进行苄基化,反应温度足以使反应物保持在气相中。特别公开的是 2,5-二苄基-4-取代苯酚,它们在 3 和 5 位被任选取代。2,6-二苄基-4-取代的化合物显示出良好的抗氧化活性