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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• 作者：Á ; lvaro Gordillo ; Ernesto de Jes&uacute ; s ; Carmen Ló ; pez-Mardomingo
• 刊名：Organic Letters
• 出版年：2006
• 出版时间：August 3, 2006
• 年：2006
• 卷：8
• 期：16
• 页码：3517 - 3520
• 全文大小：89K
• 年卷期：v.8,no.16(August 3, 2006)
• ISSN：1523-7052

文摘

The complexes [PdCl₂L₂], where L is a crown-ether-containing triarylphosphane, catalyze the formation of biaryls from arylsiloxanes and arylbromides 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.