| 发明名称 |
Verfahren zur Herstellung von reinem 4-Brom-3-hydroxy-chinophthalon |
| 摘要 |
<p>Cpds:- is prepd. by reacting 3-hydroxyquinophthalone with Br2 in H2SO4 of 80-100% strength at 0-40 degrees C (pref. 20-40 degrees C). The cpd. is a known dye. No. purification is necessary after isolation by pouring into ice water, filtering, washing and drying.</p> |
| 申请公布号 |
CH513861(A) |
申请公布日期 |
1971.10.15 |
| 申请号 |
CH19690012233 |
申请日期 |
1969.08.12 |
| 申请人 |
FARBWERKE HOECHST AKTIENGESELLSCHAFT VORMALS MEISTER LUCIUS & BRUENING |
发明人 |
SPIETSCHKA,ERNST,DR.;ISCHE,FRIEDRICH,DR. |
| 分类号 |
C09B25/00;(IPC1-7):C07D33/34 |
主分类号 |
C09B25/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
