Fluorenes and Styrenes by Au(I)-Catalyzed Annulation of Enynes and Alkynes
摘要:
Intermolecular annulation of enynes and propargyl esters to selectively produce styrenes or fluorenes is reported. The divergent arene syntheses involve a Au-catalyzed, two-pot, multistep process proceeding cis-diastereoselective cyclopropanation, cycloisomerization, and, finally, annulation or elimination.