Zinc Triflate Catalyzed Aerobic Cross-Dehydrogenative Coupling (CDC) of Alkynes with Nitrones: A New Entry to Isoxazoles
作者:Sandip Murarka、Armido Studer
DOI:10.1021/ol200849k
日期:2011.5.20
A mild, operationally simple cross-dehydrogenative coupling between nitrones and terminal alkynes is described by using cheap, readily available 3,3',5,5'-tetra-tert-butyldipheno-quinone and dioxygen as oxidants. These cross-couplings can be performed on various nitrones and alkynes with good to excellent yields. Product nitrones are readily transformed to pharmaceutically important 3,5-disubstituted isoxazoles.