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 polysubstitutedpyridines 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 “onepot” reaction from phosphonates 6 when these compounds are metallated followed by addition of nitriles and unsaturated carbonyl compounds.