Unprecedented Hydrogen Transfer from Water to Alkenes and Alkynes Mediated by TiIII and Late Transition Metals

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• 作者：Araceli G. Campañ ; a ; Rosa E. Esté ; vez ; Noelia Fuentes ; Rafael Robles ; Juan M. Cuerva ; Elena Buñ ; uel ; Diego Cá ; rdenas ; J. Enrique Oltra
• 刊名：Organic Letters
• 出版年：2007
• 出版时间：May 24, 2007
• 年：2007
• 卷：9
• 期：11
• 页码：2195 - 2198
• 全文大小：93K
• 年卷期：v.9,no.11(May 24, 2007)
• ISSN：1523-7052

文摘

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We describe how alkenes and alkynes can be hydrogenated under mild conditions by hydrogen transfer from water mediated by titanocene(III)and a substoichiometric quantity of one of the late transition metals usually employed as hydrogenation catalysts. This process proceedspresumably by H-atom transfer from Ti^III-coordinated water to the late transition metal partner (depicted in the drawing above), a mechanismin support of which we provide theoretical and experimental evidence.