基于紫外光谱的N-2,4-二硝基苯基吡啶季铵盐的开环

doi:10.11944/j.issn.1000-0518.2015.12.150168

摘要/Abstract

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%。

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

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 ring-opening 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%.

Key words: N-(dinitrophenyl) pyridinium chloride, ring-opening, N-(anilino-pentadienylidene) aniline hydrochloride, UV spectrum

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.

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.

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