Solvent-Free Microwave-Assisted Synthesis of Substituted Pyridines Using NH4OAc as Nitrogen Source
作者:Jorge Trilleras、Pedro De La Torre、Dency J. Pacheco、Jairo Quiroga、Manuel Nogueras、Justo Cobo
DOI:10.2174/157017811799304296
日期:2011.11.1
New 1,5-dicarbonyl compounds were prepared, as versatile precursors to pyridine derivatives, by a tandem Claisen-Schmidt condensation/ Michael addition reaction, that is condensation between 5-chloro-3-methyl-1-phenyl-1Hpyrazole- 4-carbaldehyde and acetophenones, and the formed adduct then reacts with a second molecule of acetophenone. The preparation of substituted pyridines was achieved using NH4OAc as nitrogen source under solvent-free microwave irradiation.
通过串联克莱森-施密特缩合/迈克尔加成反应,即 5-氯-3-甲基-1-苯基-1Hpyrazole-4-甲醛与苯乙酮缩合,然后形成的加合物与第二个苯乙酮分子反应,制备了新的 1,5 二甲基化合物,作为吡啶衍生物的多功能前体。以 NH4OAc 为氮源,在无溶剂微波辐照下制备取代的吡啶。