Molybdenum-Catalyzed Synthesis of Nitrogenated Polyheterocycles from Nitroarenes and Glycols with Reuse of Waste Reduction Byproduct
作者:Rubén Rubio-Presa、Marı́a R. Pedrosa、Manuel A. Fernández-Rodríguez、Francisco J. Arnáiz、Roberto Sanz
DOI:10.1021/acs.orglett.7b02792
日期:2017.10.6
the efficient synthesis of pyrrolo(indolo)[1,2-a]quinoxalines and pyrrolo(indolo)[3,2-c]-quinolines from readily available nitrobenzenes and glycols is reported. The process utilizes the carbonyl byproduct of the initial dioxomolybdenum(VI)-catalyzed reduction of nitroaromatics with glycols as a reagent for the imine generation. This method represents the first sustainable domino reaction for the preparation
BN/BO-Ullazines and Bis-BO-Ullazines: Effect of BO Doping on Aromaticity and Optoelectronic Properties
作者:Yongkang Guo、Lei Zhang、Chenglong Li、Mengjia Jin、Yanli Zhang、Jincheng Ye、Yu Chen、Xiaoming Wu、Xuguang Liu
DOI:10.1021/acs.joc.1c00777
日期:2021.9.17
We have achieved substitutional doping of ullazine with either two BO units or with one BO unit and one BN unit. The synthesis of these B-doped ullazines is straightforward, using demethylation and borylative cyclization as the key steps. Ullazine cores of both BN/BO-ullazines (2) and bis-BO-ullazines (3) are very close to being planar. Their electronic and photophysical properties were investigated
我们已经实现了用两个 BO 单元或一个 BO 单元和一个 BN 单元对 ullazine 进行置换掺杂。这些 B 掺杂的 ullazing 的合成很简单,使用去甲基化和硼酸化环化作为关键步骤。BN/BO-ullazines ( 2 ) 和双-BO-ullazines ( 3 )的 Ullazine 核都非常接近于平面。通过紫外-可见光、荧光光谱、循环伏安法和密度泛函理论计算研究了它们的电子和光物理性质。
Synthesis, Characterization, and Properties of Bis-BN Ullazines
作者:Chenglong Li、Yuming Liu、Zhe Sun、Jinyun Zhang、Meiyan Liu、Chen Zhang、Qian Zhang、Hongjuan Wang、Xuguang Liu
DOI:10.1021/acs.orglett.8b00554
日期:2018.5.18
A series of bis-BN ullazine derivatives, including the parent species, were synthesized in a small number of steps from commercially available materials. X-ray crystallographic analysis revealed that bis-BN ullazines have rigid and planar frameworks. Most of the bis-BN ullazines are stable toward air and moisture. In addition, the absorption and emission bands of these ullazines are blue-shifted, compared to those of their carbonaceous ullazine analogs.