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    • 90. 发明授权
    • 2-chloro-5-fluoro-4-morpholinonitrobenzene and
2-chloro-5-fluoro-4-morpholinoaniline
    • 2-氯-5-氟-4-吗啉代硝基苯和2-氯-5-氟-4-吗啉代苯胺
    • US5990309A
    • 1999-11-23
    • US272839
    • 1999-03-19
    • Thomas SchachTheodor Papenfuhs
    • Thomas SchachTheodor Papenfuhs
    • C07D295/06C07B61/00C07C269/00C07C269/04C07C271/28C07D295/073C07D295/135C07D295/04
    • C07D295/073C07C269/00C07C269/04C07D295/135
    • The present invention relates to a process for the preparation of N-carboxyalkyl-3-fluoro-4-dialkylaminoanilines, which comprises reacting, in a first step, an ortho-nitrochlorobenzene of the formula (1) in which X is Cl or F, with a secondary amine of the formula (2) HNR.sup.1 R.sup.2, in which R.sup.1 and R.sup.2, independently of one another, are identical or different and are an alkyl radical having from 1 to 10 carbon atoms or, together with the N atom to which they are bonded, form a ring having from 3 to 7 members, in the presence of a base in the presence or absence of a solvent at from -10 to 120.degree. C., reacting, in a second step, the 2-chloro-4-dialkylamino-5-fluoronitrobenzene with hydrogen at from 30 to 150.degree. C. and from 1 to 100 bar in the presence of a base and a noble-metal catalyst and, in a third step, extracting the 3-fluoro-4-dialkylaminoaniline from the reaction mixture using an aqueous solution of an acid as a salt dissolved in water, removing the aqueous phase and reacting the 3-fluoro-4-dialkylaminoaniline salt, dissolved in water, with a chloroformate of the formula (3) ClCO.sub.2 R.sup.3, in which R.sup.3 is an alkyl radical having from 1 to 10 carbon atoms or an aralkyl radical having from 7 to 20 carbon atoms, at from 0 to 100.degree. C. in the presence of a basic compound.
    • 本发明涉及N-羧基烷基-3-氟-4-二烷基氨基苯胺的制备方法,其包括在第一步中使式(1)的邻硝基氯苯(其中X为Cl或F) 与式(2)HNR1R2的仲胺,其中R 1和R 2彼此独立地相同或不同,并且是具有1至10个碳原子的烷基或与它们相同的N原子 在存在或不存在溶剂的情况下,在-10至120℃下,在碱的存在下形成具有3至7个成员的环,在第二步中,将2-氯-4- 二烷基氨基-5-氟硝基苯,在碱和贵金属催化剂的存在下,在30至150℃和1至100巴的氢气下进行,并且在第三步骤中,将3-氟-4-二烷基氨基苯胺从 所述反应混合物使用溶于水的盐的酸的水溶液,除去所述水相并使所述3-氟 - (3)ClCO 2 R 3的氯甲酸酯(其中R 3是具有1至10个碳原子的烷基或具有7至20个碳原子的芳烷基)溶于水中的4-氟-4-二烷基氨基苯胺盐, 在碱性化合物的存在下0至100℃。