Intramolecular Aza-Anti-Michael Addition of an Amide Anion to Enones: A Regiospecific Approach to Tetramic Acid Derivatives
作者:Xihe Bi、Jingping Zhang、Qun Liu、Jing Tan、Bing Li
DOI:10.1002/adsc.200600542
日期:2007.10.8
A novel intramolecular aza-anti-Michael addition was disclosed in the one-pot reactions between 3-oxobutanamides and aryl (heteroaryl) aldehydes under basic conditions, in which amide anions regiospecifically attacked the α-carbon of an enone fragment, providing a newroute to biologically important tetramic acid derivatives. An explanation for the unexpected regioselectivity is proposed based on the