Asymmetric Synthesis of Substituted Homotropinones from <i>N</i>-Sulfinyl β-Amino Ketone Ketals. (−)-Euphococcinine and (−)-Adaline
作者:Franklin A. Davis、Ram Edupuganti
DOI:10.1021/ol902910w
日期:2010.2.19
Sulfinimine-derived N-sulfinyl β-aminoketone ketals on heating with NH4OAc:HOAc undergo a four-step intramolecular Mannich cyclization cascade reaction to give homotropinones, such as (−)-euphococcinine, in excellent yields as single isomers.