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    • 11. 发明授权
    • Fluorinated carbocylic compounds
    • 氟化碳环化合物
    • US4792618A
    • 1988-12-20
    • US680695
    • 1984-12-12
    • Joseph F. BieronDavid Y. Tang
    • Joseph F. BieronDavid Y. Tang
    • C07C51/567C07C69/75C07C49/303C07C53/44C07C121/46
    • C07C51/567
    • Fluoro-substituted carbocyclic compounds are prepared by(A) reacting hydrogen fluoride with a chloro-cyclohexenyl compound of the formula ##STR1## where R.sub.1 and R.sub.2 are independently selected from the group consisting of --H, --CH.sub.2 OH, --COF, --COCl, --CF.sub.3, --CN, ##STR2## and --CH.sub.2 R, where R is --H or alkyl of 1-4 carbon atoms, to form a gem-dihalocyclohexane compound of the formula ##STR3## where X is chlorine and R.sub.1 and R.sub.2 are as defined above, (B) dehydrohalogenating the gem-dihalocyclohexane compound in the vapor phase to form a fluoro-cyclohexenyl compound of the formula ##STR4## (C) contacting the fluoro-cyclohexenyl compound, in the vapor phase, with a dehydrogenation catalyst to form a fluoro-substituted aromatic compound of the formula ##STR5##
    • 氟取代的碳环化合物是通过(A)使氟化氢与式(IMAGE)的氯 - 环己烯基化合物反应来制备的,其中R 1和R 2独立地选自-H,-CH 2 OH,-COF,-COCl, -CF 3,-CN,和-CH 2 R,其中R是-H或1-4个碳原子的烷基,以形成式为“IMAGE”的偕 - 二卤代环己烷化合物,其中X为氯,R 1和R 2为 (B)在蒸气相中脱氢卤化偕 - 二卤代环己烷化合物以形成下式的氟 - 环己烯基化合物:(C)使气相中的氟 - 环己烯基化合物与脱氢催化剂接触形成 具有下式的氟取代的芳族化合物
    • 19. 发明授权
    • Method of making methyl and ethyl esters of
(3-trifluoromethylphenyl)-acetic acid
    • 制备(3-三氟甲基苯基) - 乙酸的甲酯和乙酯的方法
    • US4268687A
    • 1981-05-19
    • US92117
    • 1979-11-07
    • David Y. TangArthur M. Foster
    • David Y. TangArthur M. Foster
    • C07C51/08C07C51/373C07C51/377C07C51/58C07D261/12C07C69/76
    • C07D261/12C07C51/08C07C51/373C07C51/377C07C51/58
    • The present invention provides a novel process for the production of methyl or ethyl ester of (3-trifluoromethylphenyl)-acetic acid. The process comprises the steps of:(a) converting (3-trifluoromethyl)-benzotrichloride to the corresponding benzoyl chloride,(b) cyanation of the benzoyl chloride to produce the corresponding benzoyl cyanide,(c) hydrolyzing the benzoyl cyanide to produce the corresponding keto-acid,(d) hydrogenating the keto-acid to produce (3-trifluoromethylphenyl)-alpha-hydroxyacetic acid,(e) hydrogenating (3-trifluoromethylphenyl)-alpha-hydroxyacetic acid in the presence of glacial acetic acid to produce the corresponding substituted acetic acid, and(f) esterifying the substituted acetic acid using an alcohol selected from the group consisting of methyl and ethyl to obtain the corresponding methyl or ethyl ester of (3-trifluoromethylphenyl)-acetic acid.
    • 本发明提供了一种制备(3-三氟甲基苯基) - 乙酸甲酯或乙酯的新方法。 该方法包括以下步骤:(a)将(3-三氟甲基) - 苯并三氯化物转化为相应的苯甲酰氯,(b)苯甲酰氯的氰化反应产生相应的苯甲酰氰,(c)水解苯甲酰氰,产生相应的 (3-三氟甲基苯基)-α-羟基乙酸,(e)在冰醋酸存在下氢化(3-三氟甲基苯基)-α-羟基乙酸,产生相应的 取代的乙酸,和(f)使用选自甲基和乙基的醇酯化取代的乙酸,得到相应的(3-三氟甲基苯基) - 乙酸的甲酯或乙酯。