| 发明名称 |
An improved process for the preparation of 4-haloquinazolines. |
| 摘要 |
<p>4-Haloquinazolines can be prepared by the halogenation of the corresponding 4-hydroxyquinazolines with a phosphoryl, thionyl or carbonyl halide in the presence of a catalytically effective amount of a N,N-dialkylformamide. The reaction is catalyzed by the addition of soluble organic halide salts.</p> |
| 申请公布号 |
EP0537600(A1) |
申请公布日期 |
1993.04.21 |
| 申请号 |
EP19920117058 |
申请日期 |
1992.10.06 |
| 申请人 |
DOWELANCO |
发明人 |
TAI, JIMMY J.;RINGER, JAMES W.;KRUMEL, KARL L.;KRAUSS, RICHARD C. |
| 分类号 |
B01J31/02;C07B61/00;C07D239/86;C07D239/88;C07D239/95 |
主分类号 |
B01J31/02 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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