Mercuric Triflate Catalyzed Cycloisomerization of Alkynyl-1,3-Cyclohexanedione and Alkynyl-1,3-Cyclopentanedione
作者:Mugio Nishizawa、Hiroshi Imagawa、Shuhei Kotani
DOI:10.1055/s-2006-932464
日期:——
Mercuric triflate was used to catalyze cycloisomerization of alkynyl-1,3-cyclohexanediones and cyclopentanediones to give fused oxabicyclic systems under mild reaction conditions with high catalytic turnover up to 1000 times.
Synthesis of Fused Oxabicyclic Systems by Metal-Catalyzed Intramolecular Addition of 1,3-Cycloalkyldiones to Alkynes
作者:Moisés Gulías、J. Ramón Rodríguez、Luis Castedo、José L. Mascareñas
DOI:10.1021/ol0345632
日期:2003.5.1
[reaction: see text] Readily available 4-propargyl-1,3-cyclohexanediones and cyclopentanediones can be chemo- and regioselectively cycloisomerized to synthetically appealing fused oxabicyclic systems by simply stirring at room temperature with catalytic amounts of an appropriate metal complex.