发明名称 |
2,3-Di:chloro-4-amino-phenol - used as intermediate, for plant protecting agents e.g. fungicides |
摘要 |
Prepn. of 2,3-dichloro-4-aminophenol (I) comprises reacting p-nitrosophenol in an N-alkylated carboxylic acid amide (open or cyclic) (II) opt. with an organic solvent with HC1. (II) is specifically of formula (A), R1 = H, 1-6C alkyl, 5-6C alkyl or phenyl, R2, R3 = 1-6C alkyl, 5-6C cycloalkyl or phenyl, or R1+R2 = 3-5C alkylene. The ratio of solvent to mixt. is pref. 1:1-10, pref. an aliphatic or aromatic hydrocarbon or a chlorohydrocarbon. Reaction is at -20 to 50 deg.C pref. 0-20 deg.C. The solvent is esp. satd. with HCl. The p-nitrosophenol is used at 0-50 esp. 10-20%. USE - 2,3-Dichloro-4-aminophenol used as intermediate for plant protection agent esp. fungicides.
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申请公布号 |
DE4040853(A1) |
申请公布日期 |
1992.06.25 |
申请号 |
DE19904040853 |
申请日期 |
1990.12.20 |
申请人 |
BAYER AG, 5090 LEVERKUSEN, DE |
发明人 |
PAETZ, CHRISTIAN, DIPL.-CHEM. DR., 5093 BURSCHEID, DE;FIEGE, HELMUT, DIPL.-CHEM. DR., 5090 LEVERKUSEN, DE;GUENTHER, ANDREAS, DIPL.-CHEM. DR., 5000 KOELN, DE |
分类号 |
C07C209/38;C07C213/00;C07C215/76 |
主分类号 |
C07C209/38 |
代理机构 |
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