915107-30-1

基本信息
6-氯-5-羟基烟酸甲酯
6-Chloro-5-hydroxy-nicotinic acid methyl ester
methyl 6-chloro-5-hydroxypyridine-3-carboxylate
3-Pyridinecarboxylic acid, 6-chloro-5-hydroxy-, methyl ester
物理化学性质
制备方法

30766-22-4

915107-30-1
以5-羟基烟酸甲酯为原料合成6-氯-5-羟基烟酸甲酯的一般步骤如下:在冰浴冷却条件下,向含有5-羟基烟酸甲酯(4.5g,29mmol)的烧瓶中缓慢滴加次氯酸钠水溶液(6.15%,26.7mL,22mmol)。反应混合物搅拌30分钟后,加入2M盐酸(20mL)以终止反应。通过过滤收集反应中生成的白色晶体,得到6-氯-5-羟基烟酸甲酯2.31g,收率为42%。产物结构通过1H NMR(400MHz,CDCl3)和LC-MS进行确认:1H NMR δ10.32(bs,1H),8.48(d,1H),7.84(d,1H),7.40(s,1H),3.93(s,3H);LC-MS(ELSD)显示C7H6ClNO3 [M]+的计算质量为187,实测值为187。
参考文献:
[1] Patent: US2008/108667, 2008, A1. Location in patent: Page/Page column 9-10
[2] Patent: US2016/376283, 2016, A1. Location in patent: Paragraph 0493; 0494
[3] Patent: WO2011/48525, 2011, A1. Location in patent: Page/Page column 43
[4] Patent: US2009/131468, 2009, A1. Location in patent: Page/Page column 65
[5] Patent: WO2009/64251, 2009, A1. Location in patent: Page/Page column 137