A Concise Approach to the Polycyclic Scaffold of Frondosin D
摘要:
In a study directed at developing a concise approach to the polycyclic core of frondosin D, a Stille-Heck sequence has been identified that gives direct access to the trimethylbicyclo [5.4.0]undecane ring system common to all frondosins.
Indium-catalyzed intramolecular hydroarylation of aryl propargyl ethers
作者:Lorena Alonso-Marañón、M. Montserrat Martínez、Luis A. Sarandeses、José Pérez Sestelo
DOI:10.1039/c4ob02033b
日期:——
Indium(III) halides catalyze efficiently the intramolecularhydroarylation (IMHA) of aryl propargyl ethers. The reaction proceeds regioselectively with terminal and internal alkynes bearing electron-rich and electron-deficient substituents in the benzenes and alkynes affording only the 6-endo dig cyclization product. Additionally, a sequential indium-catalyzed IMHA and palladium-catalyzed Sonogashira