The invention relates to a composition comprising a mixture of alkylated N-α-naphthyl-N-phenylamine (PANA) and alkylated diphenylamine (DPA), the product obtainable by alkylating PANA or a mixture of PANA and DPA with alkenes and the process for alkylating PANA or a mixture of PANA and DPA with alkenes. The compositions according to the present invention have an outstanding anti-oxidative action, which can be demonstrated by established test methods.
US8030259B2
申请人:——
公开号:US8030259B2
公开(公告)日:2011-10-04
Palladium-Catalyzed Annulation of Diarylamines with Olefins through CH Activation: Direct Access to N-Arylindoles
A palladium‐catalyzed dehydrogenative coupling between diarylamines and olefins has been discovered for the synthesis of substituted indoles. This intermolecular annulation approach incorporates readily available olefins for the first time and obviates the need of any additional directing group. An ortho palladation, olefin coordination, and β‐migratory insertion sequence has been proposed for the
<i>o</i>-Amino Conjugation Effect on the Photochemistry of <i>trans</i>-Aminostilbenes
作者:Cheng-Kai Lin、Ch. Prabhakar、Jye-Shane Yang
DOI:10.1021/jp200774g
日期:2011.4.21
leads to the cisisomers, account for the radiationless decays of o1R and o2. The relative efficiencies of these torsions can be readily evaluated from their quantum yields for fluorescence (Φf) and trans → cis isomerization (Φtc). The propensities of the D−A torsion are similar for the ortho and meta isomers, which is 1OM > 1Me and negligible for 1H, 1CN, and 2. The activationparameters determined