Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 34, Issue 12, Pages 1014-1019Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201300220
Keywords
alkyne-azide click chemistry; ATRP; cyclic poly(alkyl methacrylate); regulator; SN2 nucleophilic substitution reaction
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Funding
- National Nature Science Foundation of China [21074080, 21234005]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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An unprecedented strategy for the high-efficiency preparation of the cyclic polymers is developed. In this strategy, the atom transfer radical polymerization, the substitution of chain-end halide by azide group and Cu-catalyzed alkyne-azide cyclization, i.e., the frequently used three separated steps for the preparation of cyclic polymers, are integrated into a one-pot reaction by the introduction of a regulator. The kernel of this novel strategy is the utilization of the different rates between the competitive ATRP propagation and SN2 substitution of a tertiary-carbon halogen and secondary-carbon halogen. 0.55 g (yield = 59%) cyclic poly(methyl methacrylate) is obtained from 3.0 mL reaction solution. This work proposed a high-efficiency and bright promising strategy for the preparation of cyclic polymer, which would evoke more research interests on cyclic polymer.
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