One-Pot Synthesis of Tri- and Tetrasubstituted Pyridines by Sequential Ring-Opening/Cyclization/Oxidation of N-Arylmethyl 3-Aziridinylpropiolate Esters
作者:Masahiro Yoshida、Tomotaka Mizuguchi、Kosuke Namba
DOI:10.1002/anie.201409015
日期:2014.12.22
A novel strategy for the one‐pot synthesis of substituted pyridines from N‐arylmethyl 3‐aziridinylpropiolate esters is described. The method employs a three‐step procedure including the formation of allenyl imines, phosphine‐catalyzed cyclization, and subsequent oxidation of the dihydropyridines. Depending on the reaction conditions of the final oxidation step, tri‐ and tetrasubstituted pyridines can
描述了一种由N-芳基甲基3-氮丙啶基丙酸酯单锅合成取代吡啶的新策略。该方法采用三步法,包括形成烯丙基亚胺,膦催化的环化反应以及随后的二氢吡啶氧化反应。根据最终氧化步骤的反应条件,可以选择性地生产三取代和四取代的吡啶。