Abstract: | The catalytic reductive amination of pyrylium salts proceeded stereoselectively to give piperidine bases with a cis-structure. The reaction involved the formation of a pyridine intermediate; the course of the reaction depended on the structure of both the substrate and the aminating agent.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, 608–611, May, 1990. |