Palladium-Catalyzed Intramolecular C(sp3)H Functionalization: Catalyst Development and Synthetic Applications
作者:Julien Hitce、Pascal Retailleau、Olivier Baudoin
DOI:10.1002/chem.200600811
日期:2007.1.12
system, based on a mixture of palladium acetate and tris(5-fluoro-2-methylphenyl)phosphane (F-TOTP), has been designed for the intramolecular C--H functionalization of alkane segments. Among other analogues of tris(2-methylphenyl)phosphane (P(o-tol)(3)), F-TOTP was shown to have the optimal metal-bonding properties for this reaction. This catalytic system operated under milder reaction conditions that
基于乙酸钯和三(5-氟-2-甲基苯基)膦(F-TOTP)的混合物的新型催化系统已被设计用于烷烃链段分子内CH官能化。在三(2-甲基苯基)膦(P(o-tol)(3))的其他类似物中,F-TOTP被证明具有该反应的最佳金属键合性能。该催化体系在较温和的反应条件下运行,该条件允许区域选择性地生产与季苄基碳原子相邻的各种烯烃,以及新型的双环和三环分子。提出了一种一般机理,在氧化加成和环钯作用后优先形成六元钯(II)钯环。在降压药维拉帕米和类似物的合成中说明了烷基在烯烃中的区域选择性CH功能化。还报道了在该合成中特别温和的钌催化的中间烯烃的直接加氢酰胺化。