Transvinylation of 4- and 5-Nitropyrazoles with Vinyl Acetate in the Presence of Mercury Acetate Immobilized on Poly(vinylazole) Substrates

IF 0.6 4区 化学 Q4 CHEMISTRY, APPLIED
L. A. Bichakhchyan, A. H. Sukoyan, T. G. Movsisyan, H. S. Attaryan
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引用次数: 0

Abstract

In this article, we aim to use polyvinylazoles as a support for mercury acetate, which can be used as a heterogeneous catalyst in transvinylation reactions for the synthesis of vinyl derivatives of azoles. The transition from a homogeneous to a heterogeneous system in transvinylation reactions allows for the easy separation of the catalyst from the reaction mixture and its reuse, which thereby reducing mercury salt pollution in wastewater. Cross-linked polyvinylazoles, obtained through radical copolymerization of vinyltriazole and vinylimidazole with divinylbenzene, were used as a support. Subsequently, these cross-linked polymers were heated in a mixture of benzene and acetic acid with mercury oxide. The amount of mercury acetate in the obtained complex is 60–65%. The structure of the obtained complexes was confirmed by IR spectroscopy, and they were tested as heterogeneous catalysts in transvinylation reactions in the azole-vinyl acetate system. It has been shown that the obtained heterogeneous catalysts can be successfully used (approximately six times) in selected transvinylation reactions. The structure of the obtained vinylazoles was confirmed by IR and NMR 1H and 13C spectroscopic methods.

4-和5-硝基吡唑与醋酸乙烯基在聚乙烯基唑底物固定化乙酸汞存在下的转乙烯化反应
在本文中,我们的目的是利用聚乙烯基唑作为醋酸汞的载体,醋酸汞可以作为非均相催化剂在转乙烯化反应中用于合成偶氮的乙烯基衍生物。在转乙烯基化反应中,从均相系统到非均相系统的转变使得催化剂很容易从反应混合物中分离出来并再利用,从而减少了废水中的汞盐污染。以乙烯基三唑和乙烯基咪唑与二乙烯基苯自由基共聚得到交联聚乙烯基唑为载体。随后,这些交联聚合物在苯、乙酸和氧化汞的混合物中加热。所得配合物中醋酸汞的含量为60-65%。红外光谱证实了所制配合物的结构,并对其作为非均相催化剂在唑-醋酸乙烯酯体系中进行了转乙烯基化反应。结果表明,所制备的多相催化剂可成功地(约6次)用于选定的转乙烯化反应。所得乙烯基唑的结构经IR、NMR 1H和13C谱分析证实。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
1.60
自引率
11.10%
发文量
63
审稿时长
2-4 weeks
期刊介绍: Russian Journal of Applied Chemistry (Zhurnal prikladnoi khimii) was founded in 1928. It covers all application problems of modern chemistry, including the structure of inorganic and organic compounds, kinetics and mechanisms of chemical reactions, problems of chemical processes and apparatus, borderline problems of chemistry, and applied research.
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