An efficient procedure for the synthesis of 2,4,6-triarylpyridines (Krohnke pyridines) by the one-pot multicomponent condensation of aldehydes (1 equiv) with acetophenones (2 equiv) and ammonium acetate (1.2 equiv) in the presence of catalytic amounts of oxozirconium(IV) chloride (ZrOCl2) under solvent-free conditions is described. In this work, four products have been reported for the first time.
Application of salicylic acid as an eco‐friendly and efficient catalyst for the synthesis of 2,4,6‐triaryl pyridine, 2‐amino‐3‐cyanopyridine, and polyhydroquinoline derivatives
作者:Majid Roozifar、Nourallah Hazeri、Homayoun Faroughi Niya
DOI:10.1002/jhet.4242
日期:2021.5
In this study, three eco‐friendly, efficient, and convenient protocols have been reported for one‐pot synthesis of 2,4,6‐triaryl pyridine, 2‐amino‐3‐cyanopyridine, and polyhydroquinoline derivatives using salicylic acid as a catalyst under solvent‐free condition. The reported protocols offer several significant advantages such as the application of a nontoxic, neutral, and cheap catalyst, environmentally