PtCl2-Catalyzed Hydrative Cyclization of Trialkyne Functionalities to Form Bicyclic Spiro Ketones
作者:Hsu-Kai Chang、Swarup Datta、Arindam Das、Arjan Odedra、Rai-Shung Liu
DOI:10.1002/anie.200700022
日期:2007.6.18
Diversity in Platinum-Catalyzed Hydrative Cyclization of Trialkyne Substrates To Form Tetracyclic Ketones
作者:Hsu-Kai Chang、Yen-Chen Liao、Rai-Shung Liu
DOI:10.1021/jo701458b
日期:2007.10.1
We report a one-pot synthesis of tetracyclic ketones via PtI2-catalyzed hydrativecyclization of trialkyne functionalities. These triyne substrates bear an electron-rich aryl group at the outer alkyne to direct the initial hydration occurring at the adjacent alkynyl carbon. This tandem catalysis is proposed to comprise two alkyne hydrations, an alkyne insertion and an intramolecular aldol condensation