A “one pot” synthesis of polysubstituted pyridines from metallated alkylphosphonates, nitriles and α,β-unsaturated ketones
作者:Francisco Palacios、Ana M. Ochoa de Retana、Julen Oyarzabal
DOI:10.1016/0040-4039(96)00850-7
日期:1996.6
A simple and efficient synthesis of polysubstituted pyridines is described. The key step is based on the regioselective addition of lithiated β-enaminophosphonates 5 to unsaturated carbonyl compounds 3. Pyridines 1 can also be obtained in “one pot” reaction from phosphonates 6 when these compounds are metallated followed by addition of nitriles and unsaturated carbonyl compounds.
描述了一种简单有效的多取代吡啶的合成方法。关键步骤是基于将锂化的β-烯氨基膦酸酯5的区域选择性加成到不饱和羰基化合物3上。当这些化合物金属化后,通过添加腈和不饱和羰基化合物,也可在“一锅”反应中从膦酸酯6获得吡啶1。