第 51 卷第 3 期 |  | Vol. 51 No. 3 | 2021 年 6 月 | Jun 2021 |
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所屬欄目:農藥及中間體
4-氯-2-氨基聯(lián)苯的綠色合成與表征 |
劉旗龍,尚 宇,張 淳*
(陜西省環(huán)境監測中心站,陜西 西安 710054) |
摘 要:以對氯溴苯和鄰氯硝基苯為原料,經(jīng)格氏反應、Suzuki偶聯(lián)、Pd-C催化加氫還原3步反應合成了4'-氯-2-氨基聯(lián)苯。格氏反應中,優(yōu)化的反應條件為n(對氯溴苯)∶n(硼酸三甲酯)=1.0∶1.2,反應溫度為0 ℃。Suzuki偶聯(lián)反應中,優(yōu)化的反應條件為n(鄰氯硝基苯)∶n(4-氯苯硼酸)∶n(PdCl2(PPh3)2)=1.00∶1.10:0.01,還原反應的較佳反應溫度為50 ℃。在優(yōu)化的反應條件下,4'-氯-2-氨基聯(lián)苯的合成總收率≥59.7%(以對氯溴苯計),純度95.0%;產(chǎn)物結構經(jīng)IR、1H NMR、MS確證。該工藝簡(jiǎn)單經(jīng)濟,條件溫和,高效環(huán)保,適合工業(yè)化生產(chǎn)。 |
關(guān)鍵詞:4'-氯-2-氨基聯(lián)苯;綠色合成;表征 |
中圖分類(lèi)號:TQ455 文獻標識碼:A 文章編號:1009-9212(2021)03-0014-03 |
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Green Synthesis and Characterization of 4'-Chloro-2-aminobiphenyl |
LIU Qi-long, SHANG Yu, ZHANG Chun*
(Shaanxi Environmental Monitoring Center, Xi′an 710054, China) |
Abstract:4'-Chloro-2-aminobiphenyl was synthesized using 4-bromochlorobenzene and 1-chloro-2-nitrobenzene as starting material by a series of Grignard reaction, Suzuki coupling reaction, Pd-C catalytic hydrogenation reduction. Under the optimal reaction conditions, the total yield of 4'-chloro-2-aminobiphenyl was over 59.7% based on 4-bromochlorobenzen, the purity was 95.0%. The structure was confirmed by IR, 1H NMR, MS. In the first step, the ratio of 4-bromochlorobenzen∶trimethyl borate=1.0∶1.2(mol ratio) was the optimized condition, The optimal reaction temperature is 0 ℃. In the second step, the ratio of n(1-chloro-2-nitrobenzene)∶n(4-chlorophenylboronic acid)∶n(PdCl2(PPh3)2)=1.00∶1.10∶0.01 was the optimized condition. The optimal reaction temperature of the reduction reaction is 50 ℃. This process is simple, warm economical, efficient and environmental friendly, which is suitable for industrial scale manufacture. |
Key words:4'-chloro-2-aminobiphenyl; green synthesis; characterization |
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作者簡(jiǎn)介:劉旗龍(1968—),男,江西高安人,碩士,主要從事環(huán)境管理及監測工作。
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聯(lián) 系 人:張 淳,高級工程師,碩士,主要從事環(huán)境管理及環(huán)境監測工作(E-mail:45795694@qq.com)。
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收稿日期:2020-11-11
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