A convenient approach for the synthesis of substituted pyrroles by using phosphoric acid as a catalyst and their photophysical properties
作者:Yusuf Ajibola Ibrahim、Jiahui Li、Liankun Ai、Baolin Li
DOI:10.1016/j.molstruc.2021.132123
日期:2022.3
pyrrole compounds aside from six knowns, including the synthetically challenging tetra- and penta-substituted pyrroles from the corresponding 1,4-dicarbonyl through Paal-Knorr synthesis in the presence of 5% phosphoric acid as the catalyst. Our method is noteworthy for cheap catalyst, uncomplicated experimental setup under air atmosphere, scalability, and excellent yields. The fluorescence of some
除了六种已知的吡咯化合物外,还有二十三种新的吡咯化合物,包括在 5% 磷酸作为催化剂的情况下,通过 Paal-Knorr 合成从相应的 1,4-二羰基合成具有挑战性的四取代和五取代吡咯。我们的方法值得注意的是廉价的催化剂、空气气氛下的简单实验设置、可扩展性和优异的产率。在稀溶液中研究了一些选定的吡咯的荧光,我们发现所有新型吡咯都发出强烈的蓝色荧光,并具有相当大的斯托克斯位移。