Regioselective conversion of alkynes to 4-substituted and 3,4-disubstituted isoxazoles using titanium-catalyzed multicomponent coupling reactions
作者:Amila A. Dissanayake、Aaron L. Odom
DOI:10.1016/j.tet.2011.11.043
日期:2012.1
Conditions have been developed for the regioselective synthesis of 4-substituted isoxazoles from terminal alkynes and 3,4-disubstituted isoxazoles from internal alkynes. The methodology involves a one-pot titanium-catalyzedmulticomponentcouplingreaction followed by simple hydroxylamine hydrochloride addition.