Total Synthesis of Pumiliotoxins 209F and 251D via Late-Stage, Nickel-Catalyzed Epoxide−Alkyne Reductive Cyclization
作者:Katrina S. Woodin、Timothy F. Jamison
DOI:10.1021/jo071132e
日期:2007.9.1
Pumiliotoxins 209F and 251D were synthesized using highly selective nickel-catalyzed epoxide−alkyne reductive cyclizations as the final step. The exocyclic (Z)-alkene found in the majority of the pumiliotoxins was formed stereospecifically and regioselectively, without the use of a directing group on the alkyne, and the epoxide underwent ring opening exclusively at the less hindered carbon to provide