Enyne metathesis reactions on 1,5-enyne substrates are described, using Grubbs-Hoveyda II catalyst and under microwave irradiation: Cyclobutenes have been obtained in low to fair yields (19-58%).
Relay Redox and Lewis Acid Catalysis in the Titanocene- Catalyzed Multicomponent Assembly of 1,5-Enynes
作者:Antonio J. Lepore、David M. Pinkerton、Brandon L. Ashfeld
DOI:10.1002/adsc.201300359
日期:2013.5.17
Herein we describe a direct, multicomponentassembly of 1,5‐enynes. The titanocene‐catalyzed coupling of an aryl aldehyde, iodoalkyne, and allylsilane enables the convergent and rapid synthesis of this versatile architectural motif in good to excellent yields.