Scandium triflate and secondary amine promoted AA′B 2:1 coupling and formal inverse electron demand Diels–Alder reactions of dienals
作者:Chris D. Smith、Robert A. Batey
DOI:10.1016/j.tet.2007.11.035
日期:2008.1
ion activation of the diene. A purely amine promoted formal inverseelectrondemand Diels–Alder cycloadditionapproach was also demonstrated in the 2:1 coupling of 2,4-hexadienal with methanol. These reactions demonstrate the concepts of dual metal/amine catalysis and amine promoted formal inverseelectrondemand Diels–Alder cycloadditions. They differ from known examples of organocatalyzed Diels–Alder