Preparation of 5-Substituted 1<i>H</i>-Tetrazoles Catalyzed by Scandium Triflate in Water
作者:Adiel Coca、Evan Turek、Liana Feinn
DOI:10.1080/00397911.2014.957775
日期:2015.1.17
Abstract Several 5-substituted1H-tetrazoles were prepared in water or isopropanol/water mixtures using microwave heating. Good yields were obtained for the [2 + 3] cycloaddition of sodium azide with aryl nitriles, aliphatic nitriles, and vinyl nitriles when catalyzed by scandium triflate. The reactions were typically heated for 1 h at 160 °C in a 3:1 isopropanol/water mixture to obtain the best yields
Microwave Synthesis of 5-Substituted 1<i>H</i>-Tetrazoles Catalyzed by Bismuth Chloride in Water
作者:Adiel Coca、Liana Feinn、Joshua Dudley
DOI:10.1080/00397911.2014.989451
日期:2015.4.18
Abstract Bismuth chloride was used to catalyze the [2 + 3] cycloaddition between sodium azide with aryl nitriles, aliphatic nitriles, and vinyl nitriles. A number of 5-substituted1H-tetrazoles were synthesized in water or isopropanol/water mixtures using microwave heating. Good yields were obtained for these reactions when heated for 1 h at 120–160 °C in a 3:1 isopropanol/water mixture. A few of the
Mg, Fe, Na, Mn, and Sr. It showed an excellent catalytic performance in synthesizing of 5-substituted-1H-tetrazoles through [3 + 2] cycloaddition reactionbetween sodium azide and nitrile compounds. Various aliphatic and aromatic nitriles and sodium azide were reacted in the presence of a catalytic amount of igneous rock nano-powder at 80 o C temperature in PEG-400. The protocol was simple and rapid
报道了使用火成岩纳米粉作为非均相和可回收的多氧化物纳米催化剂合成5-取代-1H-四唑。最初采用球磨法制备火成岩纳米粉体。然后,通过FTIR、FESEM、XRF、XRD、Histogram和EDS等不同的光谱、显微和热重技术对制备的火成岩纳米粉的结构、形貌和磁性进行了表征。仪器分析表明,制备的火成岩粉末是Si、Al、Ca、Mg、Fe、Na、Mn、Sr等金属氧化物的混合物,在5-取代-1H的合成中表现出优异的催化性能。 -四唑通过叠氮化钠和腈化合物之间的[3 + 2]环加成反应。各种脂肪族和芳香族腈与叠氮化钠在催化量的火成岩纳米粉存在下在 80 o C 温度下在 PEG-400 中反应。该方案简单快速,获得的四唑收率合适。火成岩纳米粉末易于获取、可重复使用,并具有进一步应用于酸催化有机合成和工业需求的潜力。
Choline chloride–ZnCl<sub>2</sub>: Recyclable and efficient deep eutectic solvent for the [2+3] cycloaddition reaction of organic nitriles with sodium azide
作者:Swapnil A. Padvi、Dipak S. Dalal
DOI:10.1080/00397911.2017.1285033
日期:2017.4.18
time choline chloride–zinc chloride based deep eutectic solvent is a green and efficient reaction medium for the [2+3] cycloaddition reaction of organic nitriles with sodium azide to afford the corresponding 5-substituted 1H-tetrazoles. The present method provides an environment-friendly route, short reaction times with excellent yields, safe process, and simple workup which make this method an attractive
Diisopropylethylammonium acetate (DIPEAc): An efficient and recyclable catalyst for the rapid synthesis of 5-substituted-1<i>H</i>-tetrazoles
作者:Manisha R. Bhosle、Dastgir S. Shaikh、Lalit D. Khillare、Amarsinh R. Deshmukh、Ramrao A. Mane
DOI:10.1080/00397911.2017.1281421
日期:2017.4.3
5-substituted 1H-tetrazole derivatives through [2+3] cycloadditionreaction between benzonitriles and sodium azide using diisopropylethylammonium acetate as a recyclable reaction medium is described. The reactions proceed well at 80 °C and provide the corresponding tetrazoles in good to excellent yields (up to 94% yield). Developed method has notable advantages, such as simple and mild conditions, easy workup
摘要描述了一种简单有效的协议,用于通过苯甲腈和叠氮化钠之间的 [2+3] 环加成反应合成 5-取代的 1H-四唑衍生物,使用二异丙基乙基乙酸铵作为可回收反应介质。反应在 80 °C 下进行得很好,并以良好到极好的收率(高达 94% 的收率)提供相应的四唑。所开发的方法具有显着的优势,例如条件简单温和、易于处理、可重复使用且具有一致的催化活性,并且可以更安全地替代危险、腐蚀性的常规路易斯酸催化剂。图形概要