超声辅助下新型多相转移催化剂制备 1-丁氧基-4-硝基苯——动力学研究。
Ultrasound assisted the preparation of 1-butoxy-4-nitrobenzene under a new multi-site phase-transfer catalyst--kinetic study.
机构信息
Sri Chandrashekarendra Saraswathi Viswa Mahavidyalaya, Deemed University, Enathur, Kanchipuram, 631 561 Tamil Nadu, India.
出版信息
Ultrason Sonochem. 2014 Jan;21(1):208-15. doi: 10.1016/j.ultsonch.2013.07.016. Epub 2013 Aug 1.
In the present research work deals with the preparation of 1-butoxy-4-nitrobenzene was successfully carried out by 4-nitrophenol with n-butyl bromide using aqueous potassium carbonate and catalyzed by a new multi-site phase-transfer catalyst (MPTC) viz., N(1),N(4)-diethyl-N(1),N(1),N(4),N(4)-tetraisopropylbutane-1,4-diammonium dibromide, under ultrasonic (40 kHz, 300 W) assisted organic solvent condition. The pseudo first-order kinetic equation was applied to describe the overall reaction. Under ultrasound irradiation (40 kHz, 300 W) in a batch reactor, it shows that the overall reaction greatly enhanced with ultrasound irradiation than without ultrasound. The present study provides a method to synthesize nitro aromatic ethers by ultrasound assisted liquid-liquid multi-site phase-transfer catalysis condition.
本研究工作成功地制备了 1-正丁氧基-4-硝基苯，方法是将 4-硝基苯酚与正丁基溴在碳酸钾水溶液中反应，并用一种新型多相转移催化剂（MPTC）即 N(1)、N(4)-二乙基-N(1)、N(1)、N(4)、N(4)-四异丙基丁烷-1,4-二铵二溴化物催化。在超声波（40 kHz，300 W）辅助有机溶剂条件下进行反应。采用准一级动力学方程描述整个反应。在间歇反应器中进行超声波辐射（40 kHz，300 W）时，与没有超声波辐射相比，整个反应得到了极大的增强。本研究提供了一种在超声辅助液-液多相转移催化条件下合成硝基芳基醚的方法。
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