Triflic Acid Catalyzed Synthesis of Spirocycles via Acetylene Cations
作者:Tienan Jin、Masafumi Himuro、Yoshinori Yamamoto
DOI:10.1002/anie.200901771
日期:2009.7.27
acid (TfOH) catalyzed cyclization of alkynyl‐substituted cyclic tertiary alcohols 1 under mild conditions with good control of ring size (see scheme). The method was extended to the synthesis of bridgedbicyclicketones with high stereoselectivity.