第 49 卷第 2 期 | | Vol. 49 No. 2 | 2019 年 4 月 | Apr 2019 |
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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 |
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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 |
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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。
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收稿日期:2019-04-10
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