第 50 卷第 1 期Vol. 50 No. 1
2020 年 2 月Feb 2020

所属栏目:医药及中间体

3-甲基-5-(2H-四唑-2-基)苯胺的合成研究
徐小娜1,柯 苗1,朱周静2,刘 斌2 (1. 咸阳职业技术学院 医药化工学院 陕西 咸阳 712000;2. 陕西省中药绿色制造技术协同创新中心,陕西国际商贸学院 医药学院 陕西 西安712046)
摘 要:以3-甲基-5-硝基苯胺为原料,经过重氮化、1,3-偶极环加成、硝基还原反应得到目标化合物3-甲基-5-(2H-四唑-2-基)苯胺(1),3步反应总收率31%。反应中间体及目标化合物结构经1H NMR和ESI-MS表征。考察了重氮化反应的影响因素,优化反应条件为:n(3-甲基-5-硝基苯胺)∶n(亚硝酸钠)= 1.0∶2.0,反应温度0℃,反应时间30 min。优化条件下,3-甲基-5-硝基苯-1-重氮四氟硼酸盐(3)收率为87%。
关键词:杂环化合物;四唑;苯胺;重氮化反应;1,3-偶极环加成反应
中图分类号:TQ246  文献标识码:A  文章编号:1009-9212(2020)01-0029-03
Synthesis of 3-Methyl-5-(2H-tetrazol-2-yl) aniline
XU Xiao-na1, KE Miao1, ZHU Zhou-jing2, LIU Bin2 (1. School of Pharmaceutical & Chemical Engineering, Xianyang Vocational Technical College, Xianyang 712000, China; 2. Collaborative Innovation Center of Green Manufacturing Technology for Traditional Chinese Medicine in Shaanxi Province, School of Pharmacy, Shaanxi Institute of International Trade & Commerce, Xi'an 712046, China)
Abstract:3-Methyl-5-(2H-tetrazol-2-yl) aniline was synthesized through a three-step reaction including diazo reaction, 1,3-dipolar cycloaddition and nitro-reduction using 3-methyl-5-nitroaniline as the starting material with an overall yield of 31%. The structure of the intermediate and product were characterized by 1H NMR and ESI-MS. The optimal conditions of diazo reaction were also investigated. The reaction conditions as follows: the dosage of NaNO2 is n(2)∶n(NaNO2)=1.0∶2.0; reaction temperature of 25℃; reaction time of 30 min. Compound 3 was obtained with a yield of 87% under this optimal reaction conditions.
Key words:heterocyclic compound; tetrazole; aniline; diazo reaction; 1,3-dipolar cycloaddition
基金项目:陕西省教育厅2020年度专项科研计划项目(20JK0954)。
作者简介:徐小娜(1985-),女,山东泰安人,讲师,研究方向:天然产物及药物合成研究(E-mail:xuxiaona@163.com)。
收稿日期:2020-02-12