Reactivity and substituent effects in the cyclization of N -aryl-2-nitrosoanilines to phenazines
作者:Zbigniew Wróbel、Karolina Plichta、Andrzej Kwast
DOI:10.1016/j.tet.2017.04.046
日期:2017.6
estimated on the base of the observed reaction times. A strong opposite effect of substituents located at position para to the nitroso group and those located para to the amino group in the side ring was observed. Mechanistic explanation, based on the electronic properties of the substituents and their mesomeric effects, was presented. The usefulness of the obtained data for the designed syntheses of
An umpolung strategy for rapid access to thermally activated delayed fluorescence (TADF) materials based on phenazine
作者:Huaxing Zhang、Qiang Guo、Hu Cheng、Chunhao Ran、Di Wu、Jingbo Lan
DOI:10.1039/d1cc06705b
日期:——
radical nucleophilic addition/rearrangement of 2-aryl diazaboroles has been accomplished for the first time to construct phenazine structures. This protocol is an umpolung strategy based on the classical electrophilic mechanism, and therefore, a reversed regioselectivity was observed, which provides an opportunity to prepare sterically hindered phenazines. The resulting thermally activated delayed fluorescence
The silver-mediated annulation of arylcarbamic acids and nitrosoarenes toward phenazines
作者:Lu Wang、Fan Chen、Peng-Cheng Qian、Jiang Cheng
DOI:10.1016/j.tetlet.2021.153550
日期:2022.1
A silver-mediated annulation between arylcarbamic acids and nitrosoarenes was developed, leading to phenazines in moderate to good yields with complexity and diversity. This procedure proceeded with the sequential ortho CH functionalization of arylcarbamic acids, insertion to nitroso group and decarboxylative annulation.
开发了芳基氨基甲酸和亚硝基芳烃之间的银介导环化,导致吩嗪产量中等至良好,具有复杂性和多样性。该过程进行了芳基氨基甲酸的连续邻位C H 官能化、插入亚硝基和脱羧环化。
ORGANIC ELECTRONIC DEVICES, INCLUDING ORGANIC PHOTOVOLTAIC DEVICES, POLYMERS, AND MONOMERS
申请人:GRENIER Christophe René Gaston
公开号:US20120283377A1
公开(公告)日:2012-11-08
Materials for organic electronic devices including organic photovoltaic devices. An oligomer or polymer comprising:
wherein R
1
, R
2
, R
3
, and R
4
are independently hydrogen or solubilizing groups. Monomers and ink compositions can be also prepared. The materials can be used in an OPV active layer and show excellent absorption properties with bathochromic shift.
electro-oxidative synthesis as the general protocol for procuring phenazines under mild reaction conditions. Using aerial oxygen as an oxidant, inexpensive electrolyte, and electrodes, a diverse range of phenazines have been accessed in good yields via the ring contraction of 10,11-dihydro-5H-dibenzo[b,e][1,4]diazepines. In addition, the syntheses of phenazines and diamino phenazines via direct electro-oxidation
我们在此公开电氧化合成作为在温和反应条件下获得吩嗪的一般方案。使用空气中的氧气作为氧化剂、廉价的电解质和电极,通过 10,11-dihydro-5 H -dibenzo[ b,e ][1,4]diazepines的环收缩以良好的收率获得了多种吩嗪. 此外,还分别通过二氢吩嗪的直接电氧化和邻苯二胺的电二聚反应合成了吩嗪和二氨基吩嗪。