Phenols undergo pentaarylation around the oxygen upon a single treatment with excess aryl bromides in the presence of a palladium catalyst system to produce 2-(1,1′-biphenyl-2-yl)-6-(1,1′:3′,1″-terphenyl-2′-yl)phenol derivatives.
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
Organic electronic material and electrophotographic photosensitive member containing it
申请人:CANON KABUSHIKI KAISHA
公开号:EP0451761A1
公开(公告)日:1991-10-16
An organic electronic material comprises a compound represented by the following formula (I).
The compounds transport electrons and is excellent in durability when used in a photosensitive layer of an electrophotographic photosensitive member.