The aza–ene or the Michael addition? Examination of an unusual substituent effect on the reaction of heterocyclic ketene aminals with ethyl propiolate
作者:Mei-Xin Zhao、Mei-Xiang Wang、Zhi-Tang Huang
DOI:10.1016/s0040-4020(02)00002-9
日期:2002.2
group underwent the aza–ene reaction with ethylpropiolate under various conditions to yield the corresponding adducts, which were readily transformed into the δ-lactam fused heterocyclic products with or without the aid of sodium ethoxide in refluxing ethanol, while the ester- and cyano-substituted tertiary enediamines acted as the strong Michael donor to add to ethylpropiolate in a polar or a protic
The Regiospecific<i>N</i>-Benzylation of Heterocyclic Ketene Aminals
作者:M. X. Wang、X. D. Wu、L. B. Wang、Z. T. Huang
DOI:10.1080/00397919508011365
日期:1995.2
Abstract In the presence of sodium hydride, benzoyl-substituted heterocyclicketeneaminals 1 reacted with benzyl chloride 2 to give exclusively the N-benzylated products 3 in moderate yields.