发明授权
US5171865A Process for the preparation of optically active
4-oxo-1-benzopyran-2-carboxylic acid derivatives and intermediates
thereof
失效
光学活性4-氧代-1-苯并吡喃-2-羧酸衍生物的制备方法及其中间体
- 专利标题： Process for the preparation of optically active 4-oxo-1-benzopyran-2-carboxylic acid derivatives and intermediates thereof
- 专利标题（中）： 光学活性4-氧代-1-苯并吡喃-2-羧酸衍生物的制备方法及其中间体
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申请号： US664686申请日： 1991-03-05
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公开(公告)号： US5171865A公开(公告)日： 1992-12-15
- 发明人: Masayasu Kurono , Yasuaki Kondo , Kenji Miura , Toshinao Usui , Ryoichi Unno , Takuji Kakigami , Kiichi Sawai
- 申请人： Masayasu Kurono , Yasuaki Kondo , Kenji Miura , Toshinao Usui , Ryoichi Unno , Takuji Kakigami , Kiichi Sawai
- 申请人地址： JPX Aichi
- 专利权人： Sanwa Kagaku Kenkyusho Co., Ltd.
- 当前专利权人： Sanwa Kagaku Kenkyusho Co., Ltd.
- 当前专利权人地址： JPX Aichi
- 优先权： JPX63-44644 19880229
- 主分类号： C07C59/68
- IPC分类号： C07C59/68 ; C07D311/24
摘要：
A process for the preparation of optically active 4-oxo-1-benzopyran-2-carboxylic acid derivatives of the formula ##STR1## wherein X and Y are hydrogen atom, halogen atom or alkyl group, and R.sub.1 is hydrogen atom or alkyl group,intermediates thereof, as well as a process for the preparation of the intermediates.