- 作者: 呂良賜, 陳世傑, 林原週, 程耀毅, 劉陵崗
- 作者服務機構: Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei 106, Taiwan, R.O.C.
- 中文摘要: Two highly fluorinated bipyridine derivatives, (4,4¢-bis(RfCH2OCH2)-2,2¢-bpy) {Rf = n-C10F21 (1a), n-C10F23 (1b)}, have been synthesized starting from 4,4¢-bis(BrCH2)-2,2¢-bpy and the corresponding fluorinated alkoxides. The fluorine contents of ligands 1a-b are 62.3% and 63.3%, respectively, both being white solids, virtually insoluble in CH2Cl2 or DMF and highly fluorophilic with a partition ratio between DMF and n-C8F18 less than 1:1000. The reaction of ligands 1a-b with [Pd(CH3CN)2Cl2] results in novel Pd complexes [PdCl2(4,4¢-bis-(RfCH2OCH2)-2,2¢-bpy)] where Rf = n-C10F21 (2a), n-C10F23 (2b), respectively. The Pd complexes 2a-b are pale yellow solids, soluble only in fluorinated solvents. The Pd complexes 2a-b have been satisfactorily tested for Mizoroki-Heck arylation under fluorous biphasic catalysis conditions in that the Pd complexes 2a-b are easily recovered and maintain good catalytic activity after 8 consecutive cycles (> 90% yield). The TGA studies indicate that the Pd complexes 2a-b are thermally stable up to 300 °C.
- 英文摘要: --
- 中文關鍵字: Biphasic catalysis; Fluorinated ligand; Mizoroki-Heck reaction; Homogeneous catalysis.
- 英文關鍵字: --