| 摘要 |
<p>1338054 4-Aminophenols DOW CHEMICAL CO 29 July 1971 [3 Aug 1970] 35766/71 Heading C2C 4-Aminophenols of formula in which each R is hydrogen, C 1 -C 4 alkyl or both groups together with the nitrogen atom represent piperidino, morpholino or pyrrolidino; and each R<SP>1</SP> represents hydrogen, C 1 -C 4 alkyl or alkoxy; by reacting in an inert polar solvent a 4-bromophenol of formula with a compound of formula HN(R) 2 at 100- 300‹ C. Examples describe the preparation of (a) 4-dimethylaminophenol; 4-dimethylamino- 3 . methylphenol; 4 - dimethylamino - 3,5 - dimethylphenol; 4 - piperidino - 3,5 - dimethylphenol and 4-pyrrolidino-3,5-dimethylphenol.</p> |
