Modular functionalized polyphosphines for supported materials: previously unobserved<sup>31</sup>P-NMR «through-space» ABCD spin systems and heterogeneous palladium-catalysed C–C and C–H arylation
作者:Matthieu Beaupérin、Radomyr Smaliy、Hélène Cattey、Philippe Meunier、Jun Ou、Patrick H. Toy、Jean-Cyrille Hierso
DOI:10.1039/c4cc04307c
日期:——
Functionalized modular polyphosphines introduce a conceptual novelty in controlling both implantation and conformation of donors in immobilized catalysts.
功能化模块化多膦在控制固定催化剂中供体的植入和构象方面引入了概念上的创新。
Functionalized Tri‐ and Tetraphosphine Ligands as a General Approach for Controlled Implantation of Phosphorus Donors with a High Local Density in Immobilized Molecular Catalysts
作者:Matthieu Beaupérin、Radomyr Smaliy、Hélène Cattey、Philippe Meunier、Jun Ou、Patrick H. Toy、Jean‐Cyrille Hierso
DOI:10.1002/cplu.201402195
日期:2015.1
immobilization on virtually any kind of support. As evidenced by 31P NMR spectroscopy and the strong “through‐space” spin–spin TSJ(P,P) coupling observed between P atoms, these modified polyphosphines induce, when immobilized on a support, a high local concentration of phosphorus donors that are spatially very close to each other (3–5 Å). These functionalized ligands have been incorporated into polystyrene
负载的膦配体是在过渡金属促进的催化方面具有学术和工业热点的辅助剂。但是,应实现配体的受控注入和受控构象,以生产能够在结构上“复制”有效均相系统的固定化催化剂。我们在此提供了一种通用的合成策略,用于组装一类具有独特受控刚性构象的新型支化四膦和三膦配体,从而提供高局部密度的磷原子,以扩展与金属中心的配位。我们制备了新的官能化环戊二烯基(Cp)盐,以设计“准备固定”的多膦。这些受保护的Cp片段也可能具有合成用途,可用于生成其他负载的茂金属。然后形成了四膦和三膦并对其进行了多种功能化,以固定在几乎任何种类的载体上。如证明31 P NMR光谱以及在P原子之间观察到的强“自旋-自旋-自旋TS J(P,P)耦合”,当这些修饰的多膦固定在载体上时,会诱导高局部浓度的磷供体,这些供体在空间上非常彼此靠近(3–5Å)。这些官能化的配体已被掺入聚苯乙烯中,以得到可溶或不溶的聚合物并在无机载体如二氧化硅上。我们报告了在固定载有多膦配体的低钯负载量为0
SUPPORTED LIGANDS HAVING A HIGH LOCAL DENSITY OF COORDINATING ATOMS
申请人:Hierso Jean-Cyrille
公开号:US20130158219A1
公开(公告)日:2013-06-20
The invention relates to compounds, in particular phosphinic ligands of metal complexes, as well as to metal complexes including said ligands and to supported catalysts including said metal complexes or said compounds. The invention also relates to methods for synthesizing said compounds, to complexes, and to supported catalysts, as well as to intermediate products used in said synthesis methods. The invention further relates to the uses of said compounds. The compounds of the invention are ferrocene compounds which have been functionalized so as to be capable of being heterogenized. The invention can be used in particular in the field of heterogeneous catalysis.
protocols for Wittigreaction and palladium-catalyzed Heck coupling give expedient access to a series of unprecedented polyfunctionalized artificial-resveratrol derivatives. In the modified Wittig protocol, trimethylsilyl was used as a highly valuable protective group of the phenolic functions of starting aromatic materials. A clean O-alkylation of hydroxylated stilbenes with ethylene carbonate was