Page 190 - 《精细化工》2021年第11期
P. 190
第 38 卷第 11 期 精 细 化 工 Vol.38, No.11
2021 年 11 月 FINE CHEMICALS Nov. 2021
医药与日化原料
醋酸氟卡尼合成路线改进
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刘 潇,刘 霞,李咏乐,杨 超,胡 昱 ,袁忠义
(南昌大学 化学学院,江西 南昌 330031)
摘要:以商品化 2,5-二(2,2,2-三氟乙氧基)苯甲酸(Ⅰ)为原料,二氯亚砜为酰氯化试剂,得到 2,5-二(2,2,2-三氟
乙氧基)苯甲酰氯(Ⅱ),中间体Ⅱ再与 2-氨甲基哌啶反应得到盐酸氟卡尼(Ⅲ),化合物Ⅲ通过碱中和再与醋酸
络合成盐得到目标产物醋酸氟卡尼。考察了投料比、反应时间以及溶剂对化合物Ⅲ收率的影响,优选的反应条
件为:n(Ⅰ)∶n(2-氨甲基哌啶)= 1∶1.8(其中,化合物Ⅰ先活化成酰氯),以四氢呋喃为溶剂,冰浴搅拌 2.0 h,
得到盐酸氟卡尼。再以乙醇为溶剂,NaOH 为碱,回流中和 0.5 h,得到氟卡尼(Ⅳ);最后,选用异丙醇为溶剂,
中间体Ⅳ与醋酸回流 0.5 h,冷却析出得到目标产物。4 步反应总收率为 39.2%,经过两次结晶,最终产物醋酸
氟卡尼 HPLC 纯度高于 99.7%。
关键词:2,5-二(2,2,2-三氟乙氧基)苯甲酸;醋酸氟卡尼;结晶;工艺改进;医药原料
中图分类号:TQ463 文献标识码:A 文章编号:1003-5214 (2021) 11-2336-05
Process improvement on synthesis of flecainide acetate
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LIU Xiao, LIU Xia, LI Yongle, YANG Chao, HU Yu , YUAN Zhongyi
(College of Chemistry, Nanchang University, Nanchang 330031, Jiangxi, China)
Abstract: 2,5-Bis(2,2,2-trifluoroethoxy)benzoyl chloride (Ⅱ) was synthesized by acylating chlorination
between commercial 2,5-bis(2,2,2-trifluoroethoxy)benzoic acid (Ⅰ) and dichlorosulfoxide. The amination
of intermediate Ⅱ and piperidin-2-ylmethanamine led to flecainide hydrochloride (Ⅲ). Targeting
compound flecainide acetate was obtained by neutralization of compound Ⅲ with alkali and then
salification with acetic acid. The effects of molar ratio of raw materials, reaction time and solvent on the
yield of compound Ⅲ were investigated. The optimized reaction conditions for synthesis of compound Ⅲ
were as follows: n(Ⅰ)∶n(piperidin-2-ylmethanamine)=1∶1.8 (herein, compound Ⅰwas first activated to
form intermediate Ⅱ), using tetrahydrofuran as solvent, and reaction for 2.0 h in an ice bath. Subsequently,
flecainide (Ⅳ) was prepared by neutralization of compound Ⅲ with NaOH using ethanol as solvent and
refluxing for 0.5 h. Finally, intermediate Ⅳ was reflux in the presence of acetic acid for 0.5 h using
isopropyl alcohol as solvent and then cooled, and the target product was obtained. The total yield of
four-step reaction was 39.2%, and the purity of the final product was higher than 99.7% by HPLC analysis
after two crystallization.
Key words: 2,5-bis(2,2,2-trifluoroethoxy)benzoic acid; flecainide acetate; crystallization; process
improvement; drug materials
醋酸氟卡尼化学名为 N-(2-哌啶基甲基)-2,5- 双 性心动过速、房室结折返性心动过速、房室折返性
[6]
(2,2,2-三氟乙氧基)苯甲酰胺醋酸盐,是由美国 Riker 心动过速等室上性心律失常的治疗 。
[1]
实验室 研制开发的一种口服Ⅰc 类抗心律失常药 国外工业上生产醋酸氟卡尼的主要方法是以
物 [2-3] 。1984 年获 FDA 批准在美国上市 [4-5] ,目前在 2,5-二羟基苯甲酸(化合物Ⅵ)为原料,与 2-氨甲
中国国内还没有上市,临床上主要用于阵发性室上 基吡啶反应的路线 [7-9] ,需要进行催化加氢反应,不
收稿日期:2021-06-20; 定用日期:2021-08-20; DOI: 10.13550/j.jxhg.20210633
基金项目:国家自然科学基金(21861025)
作者简介:刘 潇(1996—),男,硕士生,E-mail:565451975@qq.com。联系人:胡 昱(1979—),男,教授,E-mail:huyu@ncu.edu.cn。