第 48 卷第 4 期Vol. 48 No. 4
2018 年 8 月Aug 2018

所属栏目:医药及中间体

5-(2,4-二氟苯基)哒嗪-4-胺的合成研究
仝红娟1,2,曹文贵1,韩贵萍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4-氨基哒嗪为原料,通过溴代反应、Suzuki偶联反应,2步法合成得到目标化合物5-(2,4-二氟苯基)哒嗪-4-胺,并优化了溴代反应条件:n(苄基三甲基三溴化铵)∶n(4-氨基哒嗪)=1.2∶1.0、混合溶剂v(二氯甲烷)∶v(甲醇)= 1∶1,25℃反应2 h。总收率70.5%,产物及中间体结构经1H NMR和ESI-MS确证。
关键词:5-(2,4-二氟苯基)哒嗪-4-胺;Suzuki偶联反应;合成
中图分类号:TQ242  文献标识码:A  文章编号:1009-9212(2018)04-0027-03
Synthesis of 5-(2,4-Difluorophenyl)pyridazin-4-amine
TONG Hong-juan1,2, CAO Wen-gui1, HAN Gui-ping1, LIU Bin1,2 (1. School of Pharmacy, Shanxi Institute of International Trade & Commerce, Xi'an 712046, China; 2. Collaborative Innovation Center of Green Manufacturing Technology for Traditional Chinese Medicine in Shanxi Province, Xi'an 712046, China)
Abstract:5-(2,4-Difluorophenyl)pyridazin-4-amine was synthesized from pyridazin-4-amine through two steps including bromination reaction and Suzuki coupling reaction with a total yield of 70.5%. The affects of the reaction conditions on the yield of bromination were investigated. The optimal conditions of bromination were as followings: n(benzyl trimethyl ammonium tribromide)∶n(pyridazin-4-amine) =1.2:1.0; the mixture was stirred in v(DCM)∶v(CH3OH)=1∶1 at 25℃ for 2 h. The structures of intermediates and the product were confirmed by 1H NMR and ESI-MS.
Key words:5-(2,4-difluorophenyl)pyridazin-4-amine; Suzuki coupling reaction; synthesis
基金项目:陕西省大学生创新创业项目(201849002)。
作者简介:仝红娟(1989-),女,陕西西安人,讲师,博士,研究方向:药物小分子的合成和小分子荧光探针的合成及应用研究(E-mail:dearthj@126.com)。
收稿日期:2018-08-05