第 38 卷第 2 期 |  | Vol. 38 No. 2 | 2008 年 4 月 | Apr 2008 |
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所屬欄目:醫藥及中間體
固體光氣法合成3,4-二甲氧基苯異氰酸酯 |
齊慶瑩
(浙江理工大學(xué) 材料與紡織學(xué)院,浙江 杭州,310018) |
摘 要:以固體光氣代替光氣與3,4-二甲氧基苯胺(藜蘆胺)反應合成3,4-二甲氧基苯異氰酸酯,分析了影響反應的各種因素,優(yōu)化后的合成條件為:以氯仿為溶劑,n(固體光氣) ∶ n(藜蘆胺)=1 ∶ 2,滴液溫度0~5℃,回流溫度62℃,保溫時(shí)間6 h。此條件下合成的產(chǎn)品純度99.3%,收率82.1%。與光氣法相比,該法安全方便,產(chǎn)品純度和收率高。產(chǎn)品用紅外光譜、核磁共振儀、氣質(zhì)聯(lián)用儀進(jìn)行了表征。 |
關(guān)鍵詞:3,4-二甲氧基苯異氰酸酯;固體光氣;3,4-二甲氧基苯胺;合成 |
中圖分類(lèi)號:O625.63 文獻標識碼:A 文章編號:1009-9212(2008)02- 0035-03 |
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Synthesis of 3,4-Dimethoxyphenylisocyanate Using Triphosgene |
QI Qing-ying
(Materials & Textiles,Zhejiang Sci-Tech University,Hangzhou 310018,China) |
Abstract:3,4-Dimethoxyphenylisocyanate was synthesized from 3,4-dimethoxyaniline and BTC. The factors which affected the yield of the reaction were studied,and the optimized conditions in which the product was prepared in 82.1% yield with 99.3% purity was obtained as follows:chloroform as solvent,the molar ratio of BTC to 3,4-dimethoxyaniline 1∶2;titration temperature 0~5℃,the refluxing temperature 62℃,reaction time 6 h. In comparison with the phosgene method,the BTC method has advantages of good sasetey,convenient manipulation,high yield and purity. The structure of the title compound was characterized by IR,1H NMR,and GC-MS. |
Key words:3,4-dimethoxyphenylisocyanate;BTC;3,4-dimethoxyaniline;synthesis |
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作者簡(jiǎn)介:齊慶瑩(1969-),女,浙江天臺人,工程師,主要從事精細化工產(chǎn)品合成和應用研究。(E-mail:qqy@zstu.edu.cn)
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收稿日期:2008-02-03
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