Platinum- and Gold-Catalyzed Hydrative Carbocyclization of Oxo Diynes for One-Pot Synthesis of Benzopyrones and Bicyclic Spiro Ketones
作者:Arindam Das、Hsu-Kai Chang、Cheng-Hua Yang、Rai-Shung Liu
DOI:10.1021/ol801601q
日期:2008.9.18
We report a one-pot synthesis of benzopyrones and tricyclic spiroketones from hydrative carbocyclization of oxodiyne substrates catalyzed by PtCl(2) and PPh(3)AuCl/AgOTf, respectively. The distinct carbocyclizations with Pt and Au catalysts stem from their altered regioselectivity in the oxo-assisted hydration of the neighboring alkyne carbons.