发明授权
US07745631B2 Process for producing 2-(phenyl methyl thio)-3-pyridine carboxylic acid
有权
2-（苯甲基硫代）-3-吡啶羧酸的制备方法
- 专利标题： Process for producing 2-(phenyl methyl thio)-3-pyridine carboxylic acid
- 专利标题（中）： 2-（苯甲基硫代）-3-吡啶羧酸的制备方法
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申请号： US11547407申请日： 2004-06-17
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公开(公告)号： US07745631B2公开(公告)日： 2010-06-29
- 发明人: Shailendra Kumar Singh , Ashutosh Agarwal
- 申请人： Shailendra Kumar Singh , Ashutosh Agarwal
- 申请人地址： IN Uttar Pradesh
- 专利权人： Jubilant Organosys Limited
- 当前专利权人： Jubilant Organosys Limited
- 当前专利权人地址： IN Uttar Pradesh
- 代理机构： Knobbe Martens Olson & Bear LLP
- 优先权： IN702/04 20040412
- 国际申请： PCT/IN2004/000173 WO 20040617
- 国际公布： WO2005/097748 WO 20051020
- 主分类号： C07D213/02
- IPC分类号： C07D213/02
摘要：
The invention discloses an improved process for producing an intermediate to produce large quantity of 2-(Phenyl methyl thio)-3-pyridine carboxylic acid. The process comprises reacting 2-chloro-3-cyanopyridine with benzyl mercaptan in presence of a base and an aprotic solvent. The resulting intermediate 2-(phenyl methyl thio)-3-cyanopyridine is hydrolyzed in presence of a base in an autoclave and isolated under acidic condition to get the desired product.
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