引用本文:
邓兆静, 高康莉, 李郭成, 韩国志. 基于紫外光谱的N-2,4-二硝基苯基吡啶季铵盐的开环[J]. 应用化学,
2015, 32(12): 1379-1385.
doi:
10.11944/j.issn.1000-0518.2015.12.150168
Citation: DENG Zhaojing, GAO Kangli, LI Goucheng, HAN Guozhi. Ring-Opening Reaction of N-(2,4-Dinitrophenyl) Pyridinium Chloride by Ultraviolet Spectrum[J]. Chinese Journal of Applied Chemistry, 2015, 32(12): 1379-1385. doi: 10.11944/j.issn.1000-0518.2015.12.150168
Citation: DENG Zhaojing, GAO Kangli, LI Goucheng, HAN Guozhi. Ring-Opening Reaction of N-(2,4-Dinitrophenyl) Pyridinium Chloride by Ultraviolet Spectrum[J]. Chinese Journal of Applied Chemistry, 2015, 32(12): 1379-1385. doi: 10.11944/j.issn.1000-0518.2015.12.150168
基于紫外光谱的N-2,4-二硝基苯基吡啶季铵盐的开环
摘要:
吡啶季铵盐的开环是有机合成中的一个重要的多步串联反应,应用领域广阔。但目前对其开环机理尚存一些争议。基于开环前后,其分子共轭结构的差异,利用紫外光谱对吡啶季铵盐的开环反应过程进行了研究,并对形成其关键中间体1-苯胺基-5-苯亚胺基-1,3-戊二烯的影响因素进行了优化。此外,将超声辐射引入吡啶季铵盐的开环过程,提升了开环的效率,开环速率提高了94%。
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关键词:
- N-二硝基苯基吡啶盐
- / 开环
- / 苯胺基-苯亚胺基-戊二烯
- / 紫外光谱
English
Ring-Opening Reaction of N-(2,4-Dinitrophenyl) Pyridinium Chloride by Ultraviolet Spectrum
Abstract:
The ring-opening of pyridinium salt is an important multi-step tandem reaction,which have wide application in organic synthesis. However, principle of the ring-opening process partly remains some controversy. In this paper,based on the difference in molecular conjugate structure before and after ringopening reaction, the principle of ring-opening of pyridinium salt was studied by ultraviolet spectrum.Meanwhile,the factors influenced the formation of N-(5-anilino-2,4-pentadienylidene) aniline hydrochloride was evaluated in detail. Furthermore,ultrasonic radiation was introduced in the ring-opening reaction of pyridinnium salt and the efficiency of the ring-opening was improved for 94%.
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