Mercuric triflate catalyzed cycloisomerization of alkynyl-1,3-cyclohexanedione and alkynyl-1,3-cyclopentanedione

摘要

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.