Reported is the condensation between o‐arylenediamines and nitroarenes enabled by a cooperative action of acid and base, providing a direct entry to 2‐aryl‐2H‐benzotriazoles. The potential practicability of this methodology was demonstrated by 100 mmol‐scale reactions and the synthesis of serotonin/dopamine receptor ligand and human growth hormone.
Molybdenum-catalyzed deoxygenative heterocyclization of 2-nitroazobenzenes: a novel strategy for catalytic synthesis of 2-aryl-2<i>H</i>-benzo[<i>d</i>][1,2,3]triazoles
A novel strategy for the catalytic synthesis of 2-aryl-2H-benzo[d][1,2,3]triazoles bearing a wide range of functional groups in good to excellent yields by non-noble molybdenum-catalyzed deoxygenative heterocyclization of 2-nitroazobenzenes is described. The salient features of the transformation include the use of readily available substrates, valuable products and ease of scale-up. The mechanistic
一种通过非贵重钼催化的2的脱氧杂环化催化合成具有多种官能团的2-芳基-2H-苯并[ d ][1,2,3]三唑的新策略,收率良好至优异描述了-硝基偶氮苯。该转化的显着特点包括使用现成的底物、有价值的产品和易于扩大规模。机理研究表明该反应是通过Mo( VI )/Mo( IV )催化循环从2-硝基偶氮苯进行双重脱氧,形成2-芳基-2H-苯并[ d ][1,2,3 ]三唑-N 1 -氧化物或氮烯中间体。
Crippa, Gazzetta Chimica Italiana, 1930, vol. 60, p. 644,646
作者:Crippa
DOI:——
日期:——
NOVEL BENZOTRIAZOLE DERIVATIVES AND ORGANIC ELECTROLUMINESCENT DEVICES USING THE DERIVATIVES
申请人:HODOGAYA CHEMICAL CO., LTD.
公开号:US20140374721A1
公开(公告)日:2014-12-25
Benzotriazole derivatives represented by the following general formula (1),
wherein Ar
1
and Ar
2
are, for example, aromatic hydrocarbon groups or aromatic heterocyclic ring groups, and A is a group including a pyridine ring. The compounds excel in electron injection/transport capability, feature a high hole-blocking power and a high stability in their thin-film form, and are useful as materials for producing highly efficient and highly durable organic electroluminescent devices.