作者:Minghao Li、Xiaohan Dong、Na Zhang、François Jérôme、Yanlong Gu
DOI:10.1039/c9gc02206f
日期:——
through photooxidation of furfural and a consecutive ring-opening alcoholysis; (ii) cyclization of ethyl 4,4-diethoxycrotonate with aniline, and (iii) hydrolysis of the generated ethyl quinaldate. This new method not only avoids the use of toxic potassium cyanide but also meets many salient features of green chemistry, such as the use of bio-based feedstocks, environmentally benign metal-free conditions and
喹啉酸是重要的精细化学品。如今,合成喹啉酸的工业方法严重依赖于基于Reissert反应建立的三步法,但是该过程涉及使用剧毒的氰化钾。本文实现了4,4-二乙氧基巴豆酸乙酯对苯胺的新型环化反应,得到的喹啉乙酯收率高。基于该反应,开发了一种生态高效的制备喹啉酸的方法,该方法涉及以下三个步骤:(i)通过糠醛的光氧化和连续的开环醇解合成4,4-二乙氧基巴豆酸乙酯;(ii)用苯胺将4,4-二乙氧基巴豆酸乙酯环化,和(iii)产生的喹啉酸乙酯水解。