Synthesis and Reduction of Nitrogen-Substituted Diaryl Dihydrophenazine Diradical Dications
作者:Mustafa Ahmed、Yukun Wu、Matthew R. Schiavone、Kai Lang、Liyan You、Matthias Zeller、Jianguo Mei
DOI:10.1021/acs.orglett.3c02333
日期:2023.9.1
A one-pot synthetic approach to form core-extended N,N′-disubstituted diaryl dihydrophenazine (DADHP) diradical dications (DRDCs) via chemical oxidation from aryl-substituted ortho-phenyldiamines is reported. The isolated N,N′-disubstituted DADHP DRDCs were reduced to their neutral counterparts with hydrazine. The model system featuring an unsubstituted fluorene aryl group, 2a, was tested as a photocatalyst
A hindered phenol compound, preparation thereof and use thereof as an antioxidant
申请人:China Petroleum & Chemical Corporation
公开号:EP2952505A1
公开(公告)日:2015-12-09
This invention relates to a novel hindered phenol compound of Formula (I) (wherein the groups R and R' are as defined in the specification), preparation thereof and use thereof as an antioxidant. By using the hindered phenol compound of this invention as an antioxidant, it is possible to produce a lubricant oil composition exhibiting excellent oxidation resistance at elevated temperatures.