A convenient synthesis of macroporous polymer-supported supernucleophilic reagent and linear macromolecules

✍ Scribed by Ji-Tao Huang; Si-Hua Zheng; Jia-Qi Zhang; Jing-Wu Sun

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 151 KB
• Volume: 75
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(20000124)75:4<593::aid-app16>3.0.co;2-f

✦ Synopsis

N,NЈ-Bis(4-pyridinyl)

piperazine and N-(4-pyridinyl)piperazine have been prepared by treatment of piperazine with 4-chloropyridine. N,NЈ-Bis(4-pyridinyl)piperazine (bis-DMAP) is similar to a couple of 4-(N,N-dimethylamino)pyridine (DMAP). N-(4-Pyridinyl)piperazine as reactive group can be linked onto the macroporous polymeric carrier producing a polymer-bound catalyst. A linear epoxy polymer containing the supernucleophilic functional groups have been synthesized by reaction of epichlorohydrin and 4-aminopyridine. The linear polymeric catalysts have been braced by the macroporous resin to obtain a polymer-supported linear polymeric catalyst. It is found that catalytic activity of bis-DMAP approaches that of DMAP. The activity of the polymer-supported linear polymeric catalyst is higher than that of the polymer-bound catalyst in the acetylation of tert-butyl alcohol, as monitored by gasliquid chromatography.