Highly Efficient and Recyclable Au Nanoparticle-Supported Palladium(II) Interphase Catalysts and Microwave-Assisted Alkyne Cyclotrimerization Reactions in Ionic Liquids
作者:Yu-Yun Lin、Shih-Chung Tsai、Shuchun Joyce Yu
DOI:10.1021/jo800524h
日期:2008.7.1
reactions were investigated by solution nuclear magnetic resonance (NMR) spectroscopy with a resolution typically attained for soluble systems. These surface-bound Pd(II) complexes were highly effective catalysts for [2+2+2] alkyne cyclotrimerization reactions to give highly congested benzene rings with fairly good selectivity. The catalytic reactivity of these interphase catalysts was even higher than that
Immobilization of Homogeneous Palladium(II) Complex Catalysts on Novel Polysiloxanes with Controllable Solubility: Important Implications for the Study of Heterogeneous Catalysis on Silica Surfaces
partial hydrolysis and derivatization of (MeO)3 Si(CH2 )11 N3 . The soluble Pd complex 1 thus obtained undergoes further hydrolysis to give an insoluble supported complex. Both materials are effective catalysts for the cyclotrimerization of alkynes. Hence, this methodology allows the soluble analogue of a heterogeneous catalyst to be studied by high-resolution solution NMR spectroscopy. TMS=SiMe3
通过(MeO)3 Si(CH 2)11 N 3的部分水解和衍生化,获得了可控制溶解度的负载型催化剂。由此获得的可溶性Pd络合物1进一步水解,得到不溶的负载型络合物。两种材料都是炔烃环三聚的有效催化剂。因此,该方法允许通过高分辨率溶液NMR光谱研究非均相催化剂的可溶性类似物。TMS = SiMe 3,py = 2-吡啶基。
Choi, Kyu Sang; Park, Moon Kyeu; Han, Byung Hee, Journal of Chemical Research, Miniprint, 1998, # 9, p. 2348 - 2362
作者:Choi, Kyu Sang、Park, Moon Kyeu、Han, Byung Hee
DOI:——
日期:——
Homogeneous catalysis with a heterogeneous palladium catalyst. An effective method for the cyclotrimerization of alkynes