作者:F. Micheletti Moracci、B. Di Rienzo、S. Tortorella、F. Liberators
DOI:10.1016/s0040-4020(01)93695-6
日期:1980.1
isolated from the reaction between piperidine and pyridinium salts 1a-f. 3a-f are stable both in the solid state and in apolar solvents, whereas their fast dissociation back to piperidine and pyridinium ions occurs in aqueous solution. The latter, in the alkaline environment produced by the amine, yields the correspondent pseudobases, which are key intermediates of the subsequent reactions. For instance
从哌啶和吡啶鎓盐1a-f之间的反应中分离出共价加合物3a -f。3a-f在固态和非极性溶剂中都是稳定的,而它们在水溶液中快速解离回到哌啶和吡啶鎓离子。在胺产生的碱性环境中,后者产生相应的假碱,它们是后续反应的关键中间体。例如,来自1a,b的假碱基可以与相应的吡啶鎓阳离子进行开环反应或氧化还原过程。