| 发明名称 |
PROCESS OF PREPARATION OF PYRIDINE-3-SULFONIC ACIDS |
| 摘要 |
<p>A process for the preparation of pyridine-3-sulphonic acid free of heavy metal by oxidation of 3-chloropyridine to 3-chloropyridine N-oxide, replacement of chlorine by a sulpho group, followed by reduction to pyridine-3-sulphonic acid. The process can be carried out using the crude 3-chloropyridine N-oxide, followed by direct further reaction of the pyridine-3-sulphonic acid N-oxide in the presence of Raney nickel in alkaline solution.</p> |
| 申请公布号 |
GR910300107(T1) |
申请公布日期 |
1991.12.10 |
| 申请号 |
GR19910300107T |
申请日期 |
1991.12.10 |
| 申请人 |
RUETGERSWERKE AKTIENGESELLSCHAFT |
发明人 |
LOESCH, ROLF;ORTH, WINDFRIED, DR.;WEISS, WOLFGANG, DR.;KLEFFNER, HANS WERNER, DR. |
| 分类号 |
C07D213/70;B01J25/02;C07B61/00;C07D213/71;C07D213/89;(IPC1-7):C07D213/71;C07D213/61 |
主分类号 |
C07D213/70 |
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