在甲苯中通过Et 3 N 介导的 4-羟基香豆素/二甲酮、β-硝基苯乙烯/2-(2-硝基乙烯基)噻吩和芳胺的一锅三组分反应高效合成N-芳基-β-烯胺酮本文提出了回流条件。发现一些制备的化合物表现出压致变色特性。压致变色化合物的 XRD 和 SEM 测量显示研磨前后晶体堆积和形态发生了显着变化。此外,发现一种制备的化合物对光敏感,并且可以在紫外线照射下转化为 furo[3,2 - b ]pyridin-2(4 H )-one 衍生物。提出了这种光化学反应的合理机制。
Peptidomimetic organocatalysts: efficient Michael addition of ketones onto nitroolefins with very low catalyst loading
作者:Srivari Chandrasekhar、Chintakunta Praveen Kumar、Togapur Pavan Kumar、Kothapalli Haribabu、Bharatam Jagadeesh、Jerripothula K. Lakshmi、Prathama S. Mainkar
DOI:10.1039/c4ra04165h
日期:——
The syntheses of two novel peptidomimetic triazole-based organocatalysts that work for the asymmetric conjugate addition of cyclohexanone to nitroolefins are described. The catalysts worked with very low loading (0.5 mol%) in the absence of any additives to provide high diastereo- and enantio-selectivities.