作者:Unmesh Shah、Samuel Chackalamannil、Ashit K. Ganguly、Mariappan Chelliah、Sergei Kolotuchin、Alexei Buevich、Andrew McPhail
DOI:10.1021/ja065198n
日期:2006.10.1
synthesis of its congener (-)-GB 13 are described. Decarboxylative aza-Michael reaction of the hexacyclic lactone precursor under acidic conditions, followed by basic workup, yielded (-)-GB 13 in 80% yield. Cyclization of (-)-GB 13 to oxohimgaline under acidic conditions, followed by internally coordinated sodium triacetoxyborohydride reduction, gave (-)-himgaline as the exclusive product.