Supported Imidazolylphosphine Catalysts for Highly (E)-Selective Alkene Isomerization

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• 作者：Gulin Erdogan ; Douglas B. Grotjahn
• 刊名：Organic Letters
• 出版年：2014
• 出版时间：June 6, 2014
• 年：2014
• 卷：16
• 期：11
• 页码：2818-2821
• 全文大小：248K
• 年卷期：v.16,no.11(June 6, 2014)
• ISSN：1523-7052

文摘

For fine chemical synthesis, immobilized catalysts offer little advantage if they produce a product mixture that must be separated. Selective isomerization of terminal olefins is achieved by heterogenized bifunctional catalysts. Outstanding and consistent (E)-selectivity (>99%) even in cases where (E) and (Z) isomers are of comparable stability, combined with modest catalyst loadings (1 to 2 mol %), set these catalysts apart from previously reported systems. Ease of catalyst removal and high geometric selectivity avoid tedious purifications.