Efficient Diastereoselective Three‐Component Synthesis of Pipecolic Amides
作者:Gydo van der Heijden、Timo B. van Schaik、Valentinos Mouarrawis、Martin J. M. de Wit、Christophe M. L. Vande Velde、Eelco Ruijter、Romano V. A. Orru
DOI:10.1002/ejoc.201900399
日期:2019.9
An efficient Ugi-type three-component reaction (U-3CR) for the synthesis of pipecolic amides is reported. The U-3CR between electronically diverse isocyanides, carboxylic acids and 4-substituted Δ1-piperideines proceeds in a highly diastereoselective fashion. The Δ1-piperideines are obtained by NCS-mediated oxidation of the corresponding 4-substituted piperidines, which in turn are generated by an