引用本文:
罗军, 蔡春, 吕春绪, 曲文超. 微波促进卤素交换氟化反应合成对硝基氟苯:新型高分子相转移催化剂的应用[J]. 应用化学,
2003, 20(1): 47-50.
Citation: LUO Jun, CAI Chun, LÜ Chun-Xu, QU Wen-Chao. Microwave-promoted Halogen-exchange Reaction for Preparation of p-Fluoronitrobenzene: Application of A New Polymer Phase-transfer Catalyst[J]. Chinese Journal of Applied Chemistry, 2003, 20(1): 47-50.
Citation: LUO Jun, CAI Chun, LÜ Chun-Xu, QU Wen-Chao. Microwave-promoted Halogen-exchange Reaction for Preparation of p-Fluoronitrobenzene: Application of A New Polymer Phase-transfer Catalyst[J]. Chinese Journal of Applied Chemistry, 2003, 20(1): 47-50.
微波促进卤素交换氟化反应合成对硝基氟苯:新型高分子相转移催化剂的应用
摘要:
环状聚二烯丙基二甲基氯化铵(PDMDAAC)对热和碱稳定,可以作为有效的相转移催化剂用于卤素交换氟化反应中,其性能优于十六烷基三甲基溴化铵、负载于高分子上的季盐和吡啶盐。制得的水溶性高分子平均分子质量约为2×105g/mol,用于对硝基氯苯的卤素交换氟化反应可得到92.5%的对硝基氟苯。微波可以使反应速率提高到常规加热的3倍左右,其原因是微波对化学反应存在"非热效应"。
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关键词:
- 聚二烯丙基二甲基氯化铵
- / 氟化
- / 卤素交换反应
- / 微波促进
- / 硝基氟苯
English
Microwave-promoted Halogen-exchange Reaction for Preparation of p-Fluoronitrobenzene: Application of A New Polymer Phase-transfer Catalyst
Abstract:
Polydiallyldimethylammonium chloride(PDMDAAC), annular and stable to heat and base, could act as a more effective phase-transfer catalyst than cetyltrimethylammonium bromide or polymer-grafted quaternary phosphonium or pyridinium salts in halogen exchange reaction. In the presence of this water-soluble polymer, with an average molecular weight of some 2×105 g/mol, p-fluoronitrobenzene was prepared from p-chloronitrobenzene in yield of 92.5%. Microwave irradiation accelerated the reaction for about 3 times in comparison with common heating process probably due to the "non-thermal effect" of microwave to chemical reaction.
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