Solid-Phase Synthesis of 1,2,3,4-Tetrahydro-2-pyridones via Aza-Annulation of Enamines
作者:K. Paulvannan、Tao Chen
DOI:10.1021/jo000676c
日期:2000.9.1
via aza-annulation of enamines. Immobilized enamines were prepared from the reaction of primary amines with propynoic acid derivatives or ketones. Aza-annulation reactions were carried out by reacting resin-bound enamines with symmetrical alpha,beta-unsaturated acid anhydrides or alpha,beta-unsaturated acids in the presence of DPPA and TEA. The annulation products were isolated in good to high crude