A Heterocycle-Forming Double Michael Reaction. [5 + 1] Annulation Route to Highly Substituted and Functionalized Piperidines
作者:Freddie Hughes、Robert B. Grossman
DOI:10.1021/ol016395o
日期:2001.9.1
Nitrogen-containing tethered diacids, easily prepared by reductive alkylation of diethyl aminomalonate or ethyl cyanoglycinate, undergo double Michael reactions with 3-butyn-2-one to give highly functionalized and substituted piperidines (pipecolic acid derivatives) with surprisingly high stereoselectivity. The heterocyclic double Michael adducts can be induced to undergo further cyclizations to give