第 42 卷第 5 期 | | Vol. 42 No. 5 | 2012 年 10 月 | Oct 2012 |
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所属栏目:医药及中间体
2-氨基-5-硝基噻唑的高收率合成工艺 |
吕星鑫,吕耀宏*
(浙江理工大学 理学院,浙江 杭州 310018) |
摘 要:2-氨基-5-硝基噻唑是医药和染料重要的合成中间体。以醋酸乙烯酯为原料,经过氯化、水解、环合以及硝化等过程合成目标产物。较优工艺条件为:n(醋酸乙烯酯)∶n(硫脲)= 1∶1.0,环合温度50℃,硝化温度30℃。反应总收率提高到84%。产品经高效液相色谱、1H NMR表征。产品纯度97.5%(HPLC)。该方法具有成本低、收率高、易于工业化等优点。 |
关键词:2-氨基-5-硝基噻唑;高收率;合成工艺;2-氨基噻唑 |
中图分类号:TQ252.5 文献标识码:A 文章编号:1009-9212(2012)05-0029-03 |
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High Yield Process for the Preparation of 2-Amino-5-nitrothiazole |
L?譈 Xing-xin,L?譈 Yao-hong*
(College of Science,Zhejiang Sci-Tech University,Hangzhou 310018,China) |
Abstract:2-Amino-5-nitrothiazole is an important intermediate for organic synthesis in the fields of medicine and dyes. This compound was synthesized in overall yield of 84% starting from vinyl acetate via chlorination,hydrolysis,cyclization and nitration. The optimal reaction conditions were as follows:the molar ratio of vinyl acetate to thiourea of 1 to 1,the cyclization temperature of 50℃,the nitration temperature of 30℃. The product was confirmed with 1H NMR and HPLC. Its purity was 97.5%(HPLC). |
Key words:2-amino-5-nitrothiazole;high yield;preparation process;2-aminothiazole |
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作者简介:吕星鑫(1989-),男,浙江宁波人,硕士。研究方向:化学合成医药及制药工程。(E-mail:naork1@yahoo.com.cn)
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联 系 人:吕耀宏,高级工程师。研究方向:化学合成医药、农药及其中间体的研发和工程化。(E-mail:scie57166@gmail.com)
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收稿日期:2012-10-25
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