An efficient and recyclable heterogeneous catalytic system for the synthesis of 1,2,4-triazoles using air as the oxidant
作者:Xu Meng、Chaoying Yu、Peiqing Zhao
DOI:10.1039/c3ra47029f
日期:——
Copper–zinc supported on Al2O3–TiO2 was found as a simple and efficient heterogeneous catalyst for the oxidative synthesis of 1,2,4-triazole derivatives using air as the green oxidant under ligand-, base- and additive-free conditions. The heterogeneous reactions carried out smoothly with a large range of substrates, including NO2-, vinyl-, pyrimidine- and imidazole-contained starting materials, and provided corresponding triazoles in moderate to excellent yields with low catalyst loading (1.6 mol%). Furthermore, the catalyst can be simply recycled many times without significant loss in catalytic activity.
[EN] ORGANIC COMPOUND, AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING SAME<br/>[FR] COMPOSÉ ORGANIQUE ET DISPOSITIF ÉLECTROLUMINESCENT ORGANIQUE LE COMPRENANT<br/>[KO] 유기 화합물 및 이를 포함하는 유기 전계 발광 소자
申请人:DOOSAN SOLUS CO LTD
公开号:WO2020122614A1
公开(公告)日:2020-06-18
본 발명은 내열성, 캐리어 수송능, 및 발광능이 우수한 신규 화합물 및 이를 하나 이상의 유기물층에 포함함으로써 발광효율, 구동 전압, 수명 등의 특성이 향상된 유기 전계 발광 소자에 관한 것이다.
PhI(OCOCF<sub>3</sub>)<sub>2</sub>-Mediated Intramolecular Oxidative N–N Bond Formation: Metal-Free Synthesis of 1,2,4-Triazolo[1,5-<i>a</i>]pyridines
readily synthesized from N-(pyridin-2-yl)benzimidamides via phenyliodine bis(trifluoroacetate)-mediated intramolecular annulation. This novel strategy allows for the convenient construction of a 1,2,4-triazolo[1,5-a]pyridine skeleton through direct metal-free oxidative N–N bond formation, featuring a short reaction time and high reaction yields.
具有生物学重要性的1,2,4-三唑并[1,5- a ]吡啶很容易通过苯基碘双(三氟乙酸)介导的分子内环化反应从N-(吡啶-2-基)苯甲酰胺酰胺合成。这种新颖的策略允许通过直接形成无金属的氧化性N–N键来方便地构建1,2,4-三唑并[1,5- a ]吡啶骨架,其反应时间短且反应产率高。