C-C coupling reactions of aryl bromides and arylsiloxanes in water catalyzed by palladium complexes of phosphanes modified with crown ethers |
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| Authors: | Gordillo Alvaro de Jesús Ernesto López-Mardomingo Carmen |
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| Institution: | Departamento de Química Organica and Departamento de Química Inorganica, Universidad de Alcala, 28871 Alcala de Henares (Madrid), Spain. |
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| Abstract: | reaction: see text] The complexes PdCl2L2], where L is a crown-ether-containing triarylphosphane, catalyze the formation of biaryls from arylsiloxanes and aryl bromides with high yields in water as solvent and under air. The water-insoluble catalysts PdCl2(PhCN)2] and PdCl2(PPh3)2] are also efficient, although they decompose more quickly to form black Pd0. |
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