发明授权
US5616713A Process of preparing 2-hydroxymethyl-3,5-dimethyl-4-methoxypyridine
失效
制备2-羟甲基-3,5-二甲基-4-甲氧基吡啶的方法
- 专利标题： Process of preparing 2-hydroxymethyl-3,5-dimethyl-4-methoxypyridine
- 专利标题（中）： 制备2-羟甲基-3,5-二甲基-4-甲氧基吡啶的方法
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申请号： US681123申请日： 1996-07-22
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公开(公告)号： US5616713A公开(公告)日： 1997-04-01
- 发明人: Shan-Yen Chou , Tsai-Mien Huang , Shyh-Fong Chen , Hao Ku
- 申请人： Shan-Yen Chou , Tsai-Mien Huang , Shyh-Fong Chen , Hao Ku
- 申请人地址： TWX Taipei
- 专利权人： Development Center for Biotechnology
- 当前专利权人： Development Center for Biotechnology
- 当前专利权人地址： TWX Taipei
- 主分类号： C07D213/68
- IPC分类号： C07D213/68 ; C07D213/12
摘要：
A process of preparing 2-hydroxymethyl-3,5-dimethyl-4-methoxypyridine including the steps of acylating 2-methyl-1-penten-1-alkoxy-3-one to obtain 2-alkoxycarbonyl-3,5-dimethyl-4-pyrone; ammonolyzing 2-alkoxycarbonyl-3,5-dimethyl-4-pyrone to obtain 2-alkoxycarbonyl-3,5-dimethyl-4(1H)-pyridone; halogenating 2-alkoxycarbonyl-3,5-dimethyl-4(1H)-pyridone to obtain 2-alkoxycarbonyl-4-halo-3,5-dimethylpyridine; methoxylating 2-alkoxycarbonyl-4-halo-3,5-dimethylpyridine to obtain 2-methoxycarbonyl-3,5-dimethyl-4-methoxypyridine; and reducing 2-methoxycarbonyl-3,5-dimethyl-4-methoxypyridine to obtain 2-hydroxymethyl-3,5-dimethyl-4-methoxypyridine.