[1,2] Stevens sigmatropic rearrangement of pyrrolidinium ylides—simple synthesis of 3-aryl-2-cyano-1-methylpiperidines

• DOI: 10.1016/j.tet.2015.10.076
• Publication Date: 2015-11-04T06:29:24Z
• Authors: Anna Kowalkowska; Andrzej Jończyk
• Keywords: Diastereomer; Base (topology)

AbstractOn treatment with a base, pyrrolidinium salts like (I) undergo ring expansion towards piperidines.