第 48 卷第 4 期 |  | Vol. 48 No. 4 | 2018 年 8 月 | Aug 2018 |
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所屬欄目:醫藥及中間體
5-(2,4-二氟苯基)噠嗪-4-胺的合成研究 |
仝紅娟1,2,曹文貴1,韓貴萍1,劉 斌1,2
(1. 陜西國際商貿學(xué)院 醫藥學(xué)院,陜西 西安 712046;2. 陜西省中藥綠色制造技術(shù)協(xié)同創(chuàng )新中心,陜西 西安 712046) |
摘 要:以4-氨基噠嗪為原料,通過(guò)溴代反應、Suzuki偶聯(lián)反應,2步法合成得到目標化合物5-(2,4-二氟苯基)噠嗪-4-胺,并優(yōu)化了溴代反應條件:n(芐基三甲基三溴化銨)∶n(4-氨基噠嗪)=1.2∶1.0、混合溶劑v(二氯甲烷)∶v(甲醇)= 1∶1,25℃反應2 h?偸章70.5%,產(chǎn)物及中間體結構經(jīng)1H NMR和ESI-MS確證。 |
關(guān)鍵詞:5-(2,4-二氟苯基)噠嗪-4-胺;Suzuki偶聯(lián)反應;合成 |
中圖分類(lèi)號:TQ242 文獻標識碼:A 文章編號:1009-9212(2018)04-0027-03 |
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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 |
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基金項目:陜西省大學(xué)生創(chuàng )新創(chuàng )業(yè)項目(201849002)。
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作者簡(jiǎn)介:仝紅娟(1989-),女,陜西西安人,講師,博士,研究方向:藥物小分子的合成和小分子熒光探針的合成及應用研究(E-mail:dearthj@126.com)。
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收稿日期:2018-08-05
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