Lewis Acid Catalyzed (3 + 2)-Annulations of Donor–Acceptor Cyclopropanes and Ynamides
作者:William D. Mackay、Meryem Fistikci、Ryan M. Carris、Jeffrey S. Johnson
DOI:10.1021/ol500256n
日期:2014.3.21
The Sc(OTf)3-catalyzed (3 + 2)-annulation of donor–acceptor cyclopropanes and ynamides is described, providing the corresponding cyclopentene sulfonamides in good to excellent yield. Deprotection and hydrolysis of the resulting ensulfonamides delivers 2,3-substituted cyclopentanones with high diastereoselectivity.
描述了Sc(OTf)3催化的供体-受体环丙烷和乙酰胺的环化(3 + 2),可提供相应的环戊烯磺酰胺,收率良好或优异。所得的烯磺酰胺的脱保护和水解产生具有高非对映选择性的2,3-取代的环戊酮。