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第 40 卷第 6 期Vol. 40 No. 6
2010 年 12 月Dec 2010

所屬欄目:功能材料

還原桃紅R中間體2-羥基-4-甲基-6-氯苯并[1,2,3]二噻唑的合成研究
吳道新1,郎興芬1,黃明智2*,任葉果2,孫 炯2 (1. 長(cháng)沙理工大學(xué) 化學(xué)與生物工程學(xué)院,湖南 長(cháng)沙 410114;2. 湖南化工研究院 國家農藥創(chuàng )制工程技術(shù)研究中心,湖南 長(cháng)沙 410007)
摘 要:以鄰甲苯胺為原料,與鹽酸成鹽制得鄰甲苯胺鹽酸鹽,其再經(jīng)硫化得2-氯-4-甲基-6-氯苯并[1,2,3]二噻唑,最后經(jīng)水解合成還原桃紅R中間體2-羥基-4-甲基-6-氯苯并[1,2,3]二噻唑。筆者對成鹽反應物質(zhì)的量及硫化反應的物物質(zhì)的量比、反應溫度、反應時(shí)間及溶劑用量等因素進(jìn)行了探討,得出優(yōu)化反應條件為:n(鄰甲苯胺)∶n(氯化氫)=1∶1.13,成鹽收率可達99.8%;鄰甲苯胺鹽與一氯化硫硫化,n(鄰甲苯胺鹽)∶n(一氯化硫)=1∶3.75,硫化反應溫度60±2℃,保溫反應時(shí)間4 h,溶劑質(zhì)量與鄰甲苯胺鹽物質(zhì)的量的比為182.1 g/mol,此時(shí)目標產(chǎn)物的收率可達95.5%。產(chǎn)物結構經(jīng)IR、LC/MS與1H NMR確證。
關(guān)鍵詞:還原桃紅R中間體;2-羥基-4-甲基-6-氯苯并二噻唑;鄰甲苯胺;合成
中圖分類(lèi)號:TQ252.5  文獻標識碼:A  文章編號:1009-9212(2010)06-0056-04
Study on Synthesis of Vat Pink R Intermediate 6-Chloro-4-methyl-1,3,2-benzothiazathiolium hydroxide
WU Dao-xin1,LANG Xing-fen1,HUANG Ming-zhi2*,REN Ye-guo2,SUN Jiong2 (1.School of Chemistry and Biological Engineering,Changsha University of Science and Technology,Changsha 410114,China;2. National Engineering Research Center for Agrochemicals,Hunan Research Institute of Chemical Industry,Changsha 410007,China)
Abstract:6-Chloro-4-methyl-1,3,2-benzothiazathiolium hydroxide,a key intermediate for vat pink R,was synthesized via salification,sulfurization and hydrolyzation from o-toluidine as the start material. Based on the research results for the molar ratio of salification,molar ratio,reaction temperature,reaction time and solvent consumption of sulfurization,the optimum reaction conditions were obtained as following:the yield of salification was 99.8% while the reaction molar ratio of o-toluidine to hydrochloride was 1∶1.13,and the total yield of sulfurization and hydrolyzation was 95.5% while the reaction molar ratio of o-toluidine hydrochloride to sulfur monochloride was 1∶3.75,reaction temperature was 60±2℃,the weight of solvent to molar of o-toluidine hydrochloride was 182.1 g/mol. The chemical structure of the product was characterized by IR,LC/MS and 1H NMR.
Key words:vat pink R intermediate;6-chloro-4-methyl-1,3,2-benzothiazathiolium hydroxide;o-toluidine;synthesis
基金項目:國家自然科學(xué)基金資助項目(20872033)。
作者簡(jiǎn)介:吳道新(1970-),男,湖南岳陽(yáng)人,教授,研究方向:功能材料。(E-mail:daoxinwu@126.com)
聯(lián) 系 人:黃明智,研究員。研究方向:有機合成。(E-mail:huang-mz@163.com)
收稿日期:2010-12-20
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