作者:Olesja Koleda、Tobias Prenzel、Johannes Winter、Tomoki Hirohata、María de Jesús Gálvez-Vázquez、Dieter Schollmeyer、Shinsuke Inagi、Edgars Suna、Siegfried R. Waldvogel
DOI:10.1039/d3sc00266g
日期:——
inexpensive and reusable carbon-based electrode materials, an undivided electrochemical setup, and constant current conditions characterise this method. Sulphuric acid is used as a simple supporting electrolyte as well as a catalyst for cyclisation. The broad applicability of this protocol is demonstrated in 27 differently substituted derivatives in high yields of up to 92%. Moreover, mechanistic studies
阴极合成可以从容易获得的硝基起始材料中可持续地获得 1-羟基-和 1-氧基-喹唑啉-4-酮。该方法具有温和的反应条件、廉价且可重复使用的碳基电极材料、完整的电化学装置和恒定电流条件的特点。硫酸用作简单的支持电解质以及环化催化剂。该方案的广泛适用性在 27 种不同取代的衍生物中得到了证明,产率高达 92%。此外,基于循环伏安法测量的机理研究强调,硝基底物选择性还原为羟胺是关键步骤。克级电解放大 100 倍证明了其与制备应用的相关性。