在凝乳废水中合成香豆素-3-羧酸:一种绿色方法

N. B. Sonawane, J. Rajput, Dilip Ramsing Patil
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摘要

利用废凝乳水作为催化溶剂,开发出了一种合成香豆素-3-羧酸衍生物的高效绿色方法。在超声波辐照(40 °C)条件下,凝乳水成功催化了 2- 羟基苯甲醛与丙二酸二甲酯的反应,从而构建了不同的香豆素-3-羧酸支架,并获得了良好甚至优异的产率。使用生物可降解溶剂、可持续性强、反应时间短、反应条件温和且不含金属和路易斯酸、产率高以及与多种电子底物兼容,这些都是该合成工艺的优点。在超声波辐照下,酸性凝乳水既是生物催化剂,又是反应溶剂,与某些合成香豆素-3-羧酸的标准方法相比,酸性凝乳水可能是更好的绿色替代品。
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Synthesis of coumarin-3-carboxylic acids in waste curd water: A green approach
An efficient and green protocol has been developed for the synthesis of derivatives of coumarin-3-carboxylic acid using waste curd water as a catalytic solvent. Curd water successfully catalyzes the reaction of 2-hydroxybenzaldehydes with dimethyl malonate under ultrasonic irradiation (40 °C) to construct different scaffolds of coumarin-3-carboxylic acid, with good to outstanding yields. The use of biodegradable solvents, sustainability, low reaction duration, mild reaction conditions without metals and Lewis acids, excellent yields, and compatibility with a wide range of electronically diverse substrates are all advantages of this synthesis process. Acidic curd water, which acts as a biological catalyst as well as a solvent for the reaction under ultrasonic irradiation, may be a better green alternative to some standard methods for synthesizing coumarin-3-carboxylic acids.
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