发明公开
EP2408736A1 A PROCESS FOR THE ECO-FRIENDLY PREPARATION OF 3, 5-DIBROMO-4-HYDROXYBENZONITRILE
有权
方法对生态友好的生产3,5-二溴-4-羟基苯甲腈
- 专利标题： A PROCESS FOR THE ECO-FRIENDLY PREPARATION OF 3, 5-DIBROMO-4-HYDROXYBENZONITRILE
- 专利标题（中）： 方法对生态友好的生产3,5-二溴-4-羟基苯甲腈
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申请号： EP10717873.3申请日： 2010-02-25
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公开(公告)号： EP2408736A1公开(公告)日： 2012-01-25
- 发明人: ADIMURTHY, Subbarayappa , RAMACHANDRAIAH, Gadde , JOSHI, Girdhar , PATIL, Rajendra , GANDHI, Maheshkumar, Ramniklal , SUBBAREDDY, Mallampati , MAITI, Pratyush
- 申请人： Council Of Scientific&industrial Research (An Indian Registered body incorporated under the Registration of Societies Act(Act XXXI of 1860)
- 申请人地址： Anusandhan Bhawan 2 Rafi Marg New Delhi 110001 IN
- 专利权人： Council Of Scientific&industrial Research (An Indian Registered body incorporated under the Registration of Societies Act(Act XXXI of 1860)
- 当前专利权人： Council Of Scientific&industrial Research (An Indian Registered body incorporated under the Registration of Societies Act(Act XXXI of 1860)
- 当前专利权人地址： Anusandhan Bhawan 2 Rafi Marg New Delhi 110001 IN
- 代理机构： Shaw, Matthew Nigel
- 优先权： INDE03492009 20090225
- 国际公布： WO2010097812 20100902
- 主分类号： C07C253/30
- IPC分类号： C07C253/30 ; C07C255/53
摘要：
A highly pure 3,5-dibromo-4-hydroxybenzonitrile (bromoxynil) has been prepared in high yield from 4-hydroxybenzonitrile using eco-friendly brominating reagent comprising of 2:1 mole ratio of bromide to bromate salts in aqueous acidic medium without any catalyst under ambient conditions with no work up procedure. The product 3,5-dibromo-4-hydroxybenzonitrile was obtained in 91-99% yield with melting point 189-191° C. and more than 99% purity by gas chromatographic analysis without any purification.
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