作者:Jianfeng Li、Yongjun Mao、Yang He、Fuqiang Zhu、Weiming Chen、Jingshan Shen
DOI:10.3987/com-13-12830
日期:——
New synthetic route of N-(4-chloro-3-cyano-7-ethoxyquinolin-6-yl)acetamide (1) is described on a hectogram scale. The key steps include the intramolecular cyclization of 3-amino-2-(2-chlorobenzoyl)acrylonitrile 22 to give the 3-cyano-4-quinolone 7, which was chlorinated by POCl3 to give the final product 1 in 36.9% yield over 9 steps and 98.9% purity (HPLC). Purification methods of 7 and 1 were also given.