Chemistry Letters, Vol.36, No.9, 1162-1163, 2007
Rhenium-catalyzed [2+2] cycloadditions of norbornenes with internal and terminal acetylenes
Treatment of norbornenes with internal and terminal acetylenes in the presence of a catalytic amount of [ReBr(CO)(3)(thf)](2) gave cyclobutene derivatives in good to excellent yields.