Bis(pyrazolyl)methane Copper Complexes as Robust and Efficient Catalysts for Sonogashira Couplings
作者： Julian Moegling , Andreas D. Benischke , Jeffrey M. Hammann , Nynke A. Vepřek , Florian Zoller
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摘要: A series of bis(pyrazolyl)methane copper complexes were found to catalyze a fast palladium-free Sonogashira coupling reaction several iodoarenes with terminal alkynes such as phenylacetylene, propargyl benzyl ether, and (tert-butyl-dimethyl)silylacetylene. These reactions proceed CuCl2·2H2O (10 mol-%) under aerobic conditions the corresponding chelate ligand mol-%), its tailored facial coordination mode, is crucial for success reaction. The can also be carried out in water liquid aryl halides phase-transfer catalyst.
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