第 49 卷第 2 期Vol. 49 No. 2
2019 年 4 月Apr 2019

所属栏目:医药及中间体

1-(5-氟戊基)-1H-吲哚-3-羧酸的公斤级合成工艺研究
宋窈瑶,李 杰,王新龙,梁 淇 (成都艾必克医院科技有限公司,四川 成都 610000)
摘 要:对1-(5-氟戊基)-1H-吲哚-3-羧酸的合成工艺进行了优化,以价廉易得的吲哚为起始原料,经傅-克酰化、卤仿反应、N-烷基化、水解4步反应制备了目标化合物1-(5-氟戊基)-1H-吲哚-3-羧酸,总收率43.6%,产物纯度>99%,其结构经1H NMR和13C NMR表征确证。对吲哚N-烷基化的工艺进行了优化,采用温和易得的混合碱[n(LiOH·H2O)∶n(KOH)=5∶1]一步引入5-氟戊基侧链,革除了NaH的使用,工艺过程操作简便,反应条件温和,溶剂低毒且可回收套用,大大提升了反应的安全性,适用于工业化生产同时为其他吲哚N-烷基化反应的工业化生产提供了新的思路。
关键词:1-(5-氟戊基)-1H-吲哚-3-羧酸;N-烷基化;混合碱
中图分类号:TQ463  文献标识码:A  文章编号:1009-9212(2019)02-0026-04
A Kilo-scale Process for the Preparation of 1-(5-Fluoropentyl)-1H-indole-3-carboxylic Acid
SONG Yao-yao, LI Jie, WANG Xin-long, LIANG Qi (Chengdu Aibike Pharmaceutical Co., Chengdu 610000, China)
Abstract:1-(5-Fluoropentyl)-1H-indole-3-carboxylic acid was synthesized from cheap and easy-afforded indole through a four- steps reactions including Friedel-Crafts acylation, haloform reaction, N-alkylation and hydrolyzation with an overall yield of 43.6% and a purity of 99%. The product structure was confirmed by 1H NMR and 13C NMR. The N-acylation process of indole emphatically screened. A facile and easy-afforded mixed base of n(LiOH·H2O)∶n(KOH)=5∶1 was chose to induced 5-fluoropentyl side chain in one step. The process avoided utilization of NaH and improved the reaction security. Meanwhile, the process provided a new idea for industrial synthesis of other indole N- alkylation products. This improved synthetic route had the advantages of easy preparation and mild reaction conditions. The reaction solvents was of low toxic and reutilization and suitable for industrial production.
Key words:1-(5-fluoropentyl)- 1H-indole-3-carboxylic acid; N-alkylation; mixed base
作者简介:宋窈瑶(1989-),女,四川眉山人,工程师,硕士研究生,研究方向:药物合成工艺。
收稿日期:2019-04-10