发明授权
- 专利标题: Process for the preparation of pyridinium intermediates
- 专利标题(中): 制备吡啶鎓中间体的方法
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申请号: US934061申请日: 1992-08-21
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公开(公告)号: US5294721A公开(公告)日: 1994-03-15
- 发明人: Xiu C. Wang , Panos Kalaritis , Michelle L. Chang
- 申请人: Xiu C. Wang , Panos Kalaritis , Michelle L. Chang
- 申请人地址: IL Abbott Park
- 专利权人: Abbott Laboratories
- 当前专利权人: Abbott Laboratories
- 当前专利权人地址: IL Abbott Park
- 主分类号: C07C51/097
- IPC分类号: C07C51/097 ; C07C51/377 ; C07C63/04 ; C07C63/70 ; C07C205/58 ; C07D213/20 ; C07D213/90
摘要:
A process for the preparation of halobenzoic acids, comprising the step of reacting a halonitrobenzene with a pyridinium salt to form an intermediate of the formula ##STR1## wherein R is selected from the group consisting of hydrogen, alkyl, aryl, alkenyl, alkynyl, --CN, --COOR' and --COR' where R' is alkyl or aryl; X is chloro or fluoro; Y is hydrogen, chloro or fluoro; and Z is chloro, bromo or iodo.
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