Copper-catalyzed alkyne–aryne coupling reaction under microwave conditions: preparation of unsymmetric and symmetric di-substituted alkynes
摘要:
Several unsymmetric and symmetric alkynes were prepared excellent to modest yields by generating benzyne from the reaction of 2-(trimethylsilyl)phenyl triflate with CsF in the presence of Cul and terminal alkyne under microwave heating for 30 min at 150 degrees C. Using conventional heating, the reactions required 24 h reaction time. (C) 2009 Elsevier Ltd. All rights reserved.
hydrocarbon based on phenalenyl unit acts as a catalyst for cross-coupling between arylhalides and arylalkynes synthesizing a rich library of internal alkynes without any external stimuli. This protocol was extended to accomplish the Sonogashira-type couplingunder transition-metal-free and solvent-free conditions.
Copper-catalyzed alkyne–aryne coupling reaction under microwave conditions: preparation of unsymmetric and symmetric di-substituted alkynes
作者:Shashidhar Kumar Akubathini、Ed Biehl
DOI:10.1016/j.tetlet.2009.02.033
日期:2009.4
Several unsymmetric and symmetric alkynes were prepared excellent to modest yields by generating benzyne from the reaction of 2-(trimethylsilyl)phenyl triflate with CsF in the presence of Cul and terminal alkyne under microwave heating for 30 min at 150 degrees C. Using conventional heating, the reactions required 24 h reaction time. (C) 2009 Elsevier Ltd. All rights reserved.