第 49 卷第 5 期Vol. 49 No. 5
2019 年 10 月Oct 2019

所属栏目:医药及中间体

他达那非关键中间体(1R,3R)-1-(3,4-亚甲基二氧苯基)-2,3,4,9-四氢-1H-吡啶并[3,4-b]吲哚-3-甲酸甲酯盐酸盐的合成
高艳蓉1,唐文强1,2*,仝红娟1,2,张翠亚1,刘 斌1,2 (1. 陕西国际商贸学院 医药学院,陕西 西安712046;2. 陕西省中药绿色制造技术协同创新中心 陕西 西安712046)
摘 要:以D-色氨酸为原料,通过甲酯化和Pictet-spengler 2步反应,合成了他达那非关键中间体(1R,3R)-1-(3,4-亚甲基二氧苯基)-2,3,4,9-四氢-1H-吡啶并[3,4-b]吲哚-3-甲酸甲酯盐酸盐,2步反应总收率为87.4%。其结构经核磁共振氢谱(1H NMR)和质谱(ESI-MS)确证。考察了溶剂、物料比、温度和反应时间4个因素对Pictet-spengle反应的影响。结果表明,在反应溶剂为异丙醇、物料比n(胡椒醛)∶n(D-色氨酸甲酯盐酸盐)= 1.3∶1.0、90℃反应13 h的优化条件下,目标产物的收率达92.5%。
关键词:他达那非;关键中间体;Pictet-spengler反应
中图分类号:R97  文献标识码:A  文章编号:1009-9212(2019)05-0022-04
Synthesis of Key Intermediate of Tadalafil (1R,3R)-Methyl 1-(benzo[d][1,3]dioxol-5-yl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylate hydrochloride
GAO Yan-rong1, TANG Wen-qiang1,2*, TONG Hong-juan1,2, ZHANG Cui-ya1, LIU Bin1,2 (1. School of Pharmacy, Shaanxi Institute of International Trade & Commerce, Xi'an 712046, China; 2. Collaborative Innovation Center of Green Manufacturing Technology for Traditional Chinese Medicine in Shaanxi Province, Xi'an 712046, China)
Abstract:(1R,3R)-Methyl 1-(benzo[d][1,3]dioxol-5-yl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylate hydrochloride, the key intermediate of Tadalafil, was synthesized from D-tryptophan through a two-step reaction including esterification and Pictet-spengler reaction with a total yield of 87.4%. The structure of the product and intermediate were confirmed by 1H NMR and ESI-MS. The optimal reaction conditions of Pictet-spengler reaction were obtained as followings: isopropanol was used as solvent; the optimal molar ratio of piperonyl aldehyde and D-tryptophan methyl ester hydrochloride was 1.3; the mixture was reacted at 90℃ for 14 h. The product (Tadalafil intermediate) was obtained with a yield of 92.5% under optimal reaction condition.
Key words:tadalafil; key intermediate; Pictet-spengler reaction
基金项目: 陕西省教育厅专项科研计划项目(19JK0101),陕西省高校科协青年人才托举计划项目(20180312),陕西国际商贸学院中药质量标志物创新团队(SSY18TD02)。
作者简介:高艳蓉(1989-),女,甘肃张掖人,硕士研究生,研究方向:有机合成及分析(E-mail:544367795@qq.com)。
联 系 人:唐文强,博士,讲师,研究方向:药物合成(E-mail:twqsxcq@163.com)。
收稿日期:2019-08-26