Silver- and Gold-Catalyzed Divergent Cascade Cycloisomerization / [3 + 2] versus [2+2+1] Cycloaddition towards a Stereoselective Access to Heterohexacyclic Derivatives
A divergent cascade cycloisomerization / vs -cycloaddition via gold or silver catalysis has been reported in 1,1,1,3,3,3-hexafluoroisopropan-2-ol (HFIP). The reaction was independently optimized for both metals leading to two hexacyclic…