Copper-Zeolites as Catalysts for the Coupling of Terminal Alkynes: An Efficient Synthesis of Diynes
作者:Philippe Kuhn、Aurélien Alix、Mayilvasagam Kumarraja、Benoit Louis、Patrick Pale、Jean Sommer
DOI:10.1002/ejoc.200800848
日期:2009.1
CuI-modified zeolites, especially CuI–USY, proved to be very efficient catalysts for the homocoupling of terminalalkynes. Such heterogeneous catalysts offer a very simple (no added ligand) and convenient synthesis of diynes, including carbohydrate derivatives. A strong influence of the zeolite pore size has been observed, high (quantitative) yields being obtained with zeolites having large internal