The Cycloaddition Reactions of Furan with Cyanoacetylenes

The temperature-dependent adduct formation has been reported on the cycloaddition reactions of furan and dimethylacatyledicarboxylate as symmetrically substituted acetylene, in which the kinetically controlled products I and II are formed at room temperature, whereas the thermodynamically controlled ones, III, IV, and V, are obtained at elevated temperature.1