Bu4N[AuCl4]-catalyzed synthesis of highly substituted furans from 2-(1-alkynyl)-2-alken-1-ones in ionic liquids: An air-stable and recyclable catalytic system

摘要

The cyclization of 2-(1-alkynyl)-2-alken-1-ones proceeded smoothly in the presence of various nucleophiles with a catalytic amount of Bu4N[AuCl4] in [bmim]BF4, leading to the formation of highly substituted furans. This system is air-stable and recyclable. The catalyst is inexpensive and readily available.