发明名称 |
PROCESS FOR PREPARATION OF 5-SUBSTITUTED 2-CHLOROPYRIDINES |
摘要 |
<p>Prepn. of 5-substd. 2-chloropyridines of formula (I) comprises (1) reacting acetenamides of formula (II) with Vilsmeier reagent (III), which is prepd. by reacting formamides of formula (IV) with a chlorinating agent (V); and (2) removing excess (V) after reaction by distn. or addn. of dialkylformamide: R = opt. substd. (ar)alkyl; R1 = 1-4C alkyl or aryl-(1-4C)-alkyl; R2,R3 = linear, branched or cyclic 4-8C alkyl.</p> |
申请公布号 |
HU9600097(A2) |
申请公布日期 |
1997.04.28 |
申请号 |
HU19960000097 |
申请日期 |
1996.01.17 |
申请人 |
BAYER AG. |
发明人 |
JELICH,KLAUS;LANTZSCH,REINHARD;LINDEL,HANS;MANNHEIMS,CHRISTOPH;MERZ,WALTER |
分类号 |
C07B37/10;C07D213/61;(IPC1-7):C07D213/61 |
主分类号 |
C07B37/10 |
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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