A pyridinium modified beta-cyclodextrin: an ionic supramolecular ligand for palladium acetate in C-C coupling reactions in water

作者：Khan Raihana Imran; Pitchumani Kasi

来源：Green Chemistry, 2016, 18(20): 5518-5528.

DOI：10.1039/c6gc01326k

An ionic Pd(II) complex stabilized by a water soluble pyridinium modified beta-cyclodextrin was prepared and characterized by NMR, mass spectrometry, FT-IR spectroscopy, UV-visible spectroscopy and DLS (dynamic light scattering). The resulting Pd(II)@Pyr:beta-CD complex showed very good catalytic activity in Suzuki-Miyaura and Heck C-C coupling reactions in an environmentally benign water medium. Good to excellent yields were obtained for the coupling of various aryl halides including chlorides with phenylboronic acid/styrene using a catalytic amount of Pd(II)@Pyr:beta-CD. This homogeneous catalyst can be reused and recycled more than six times with only marginal loss of its catalytic activity.

• 出版日期2016