novel series of sulfur-containing dihydrochromeno[8,7-e][1,3]oxazine-2(8H)-thiones has been synthesized through an eco-friendly Mannich-type condensation cyclization reaction of 7-hydroxy-4-methyl-2-thiocoumarin or 6-chloro-7-hydroxy-4-methyl-2-thiocoumarin with formaldehyde and primary amines in water at 80–90°C for 2 h. All the synthesized compounds were screened for their in vitro anti-bacterial efficacy
通过7-羟基-4-甲基的环保曼尼希型缩合环化反应合成了一系列新型含
硫二氢色基[8,7-e][1,3]恶嗪-2(8H)-
硫酮-2-thiocoumarin 或 6-chloro-7-hydroxy-4-methyl-2-thiocoumarin 与
甲醛和
伯胺在 80–90°C 的
水中放置 2 小时。通过使用圆盘扩散法筛选所有合成的化合物对两种革兰氏阳性和三种革兰氏阴性菌株的体外抗菌功效。发现化合物 (8c) 对
金黄色葡萄球菌 A
TCC 2937 和肺炎克雷伯菌 A
TCC 31488 的抑制区分别为 16 和 15 mm,最有效。图形概要