α-Keto Acids as Triggers and Partners for the Synthesis of Quinazolinones, Quinoxalinones, Benzooxazinones, and Benzothiazoles in Water
作者:Jian Huang、Wei Chen、Jiazhi Liang、Qin Yang、Yan Fan、Mu-Wang Chen、Yiyuan Peng
DOI:10.1021/acs.joc.1c01497
日期:2021.11.5
the synthesis of quinazolinones, quinoxalinones, benzooxazinones, and benzothiazoles from the reactions of α-keto acids with 2-aminobenzamides, benzene-1,2-diamines, 2-aminophenols, and 2-aminobenzenethiols, respectively, is described. The reactions were conducted under catalyst-free conditions, using water as the sole solvent with no additive required, and successfully applied to the synthesis of sildenafil
由 α-酮酸分别与 2-氨基苯甲酰胺、苯-1,2-二胺、2-氨基苯酚和 2-氨基苯硫醇反应合成喹唑啉酮、喹喔啉酮、苯并恶嗪酮和苯并噻唑的通用有效方法是描述。该反应在无催化剂条件下进行,以水为唯一溶剂,无需任何添加剂,成功应用于西地那非的合成。更重要的是,这些反应可以大规模进行,产物可以很容易地通过过滤和乙醇洗涤(或结晶)进行纯化。