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    • 8. 发明授权
    • Preparation of perylene-3, 4-Dicarboxylic acid anhydrides
    • 苝-3,4-二羧酸酐的制备
    • US5900490A
    • 1999-05-04
    • US7193
    • 1998-01-14
    • Leonhard Feiler
    • Leonhard Feiler
    • C07D221/18C07C50/36C07C51/00C07C51/06C07C51/54C07D311/78C07D311/96C09B5/62C09D11/00
    • C09B5/62C07C51/54C07D311/78
    • Preparation of perylene-3,4-dicarboxylic acid anhydrides of the general formula I ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 can each be independently of one another hydrogen, halogen, C.sub.1 -C.sub.20 alkyl, C.sub.3 -C.sub.14 cycloalkyl, C.sub.1 -C.sub.20 alkoxy, phenyl, phenyloxy or phenylthio, where phenyl can in each case be mono- or polysubstituted by halogen, C.sub.1 -C.sub.20 alkyl, C.sub.3 -C.sub.14 cycloalkyl and/or C.sub.1 -C.sub.20 alkoxy; --NR.sup.5.sub.2 or --OR.sup.5, wherein R.sup.5 is hydrogen or C.sub.1 -C.sub.20 alkyl, or one of the pairs R.sup.1 /R.sup.2 and R.sup.3 /R.sup.4 each in 6,7- or 1,12-position is a bridge having the bridge atoms or bridge atom groups --O--, --S--, S.dbd.O, SO.sub.2 or --NR.sup.6, wherein R.sup.6 is hydrogen, C.sub.1 -C.sub.20 alkyl or C.sub.3 -C.sub.14 cycloalkyl, by treating a perylene-3,4-dicarboximide of formula II ##STR2## (a) in a first step with a base and, (b) in a second step, reacting the resultant anion with an alkylation agent R.sup.7 --X, X being halogen and R.sup.7 being unsubstituted or phenyl-substituted C.sub.1 -C.sub.20 alkyl, to the corresponding carboximide and,(c) in a third step, treating the alkylated carboximide first with a base and, after the treatment with a base, obtaining the perylene-3,4-dicarboxylic acid anhydride I by acidifying the reaction mixture, andnovel perylene-3,4-dicarboxylic acid anhydrides, novel N-alkylperylene-3,4-dicarboxylic acid imides and possibilities for the application of the compounds prepared according to this invention.
    • 制备通式Ⅰ的苝-3,4-二羧酸酐,其中R 1,R 2,R 3和R 4各自各自独立地为氢,卤素,C 1 -C 20烷基,C 3 -C 14环烷基,C 1 -C 20烷氧基,苯基,苯氧基 或苯硫基,其中每种情况下苯基可被卤素,C 1 -C 20烷基,C 3 -C 14环烷基和/或C 1 -C 20烷氧基单取代或多取代; -NR 52或-OR 5,其中R 5是氢或C 1 -C 20烷基,或者每个6,7或1,12位中的一对R 1 / R 2和R 3 / R 4是具有桥原子或桥原子基团的桥 -O-,-S-,S = O,SO 2或-NR 6,其中R 6是氢,C 1 -C 20烷基或C 3 -C 14环烷基,通过在第一步中处理式II(a)的苝-3,4-二甲酰亚胺 与碱反应,(b)在第二步中,使所得阴离子与烷基化试剂R7-X,X为卤素,R7为未取代的或苯基取代的C1-C20烷基反应至相应的甲酰亚胺,和(c) 第三步,首先用碱处理烷基化的酰亚胺化物,在用碱处理后,通过酸化反应混合物得到苝-3,4-二羧酸酐I,并加入新的苝-3,4-二羧酸酐 ,新型N-烷基亚丙基-3,4-二羧酸酰亚胺以及应用根据本发明制备的化合物的可能性。
    • 9. 发明授权
    • Process for the preparation of 2,3,4,5-tetrafluorobenzoic acid
    • 制备2,3,4,5-四氢叶酸的方法
    • US5179230A
    • 1993-01-12
    • US872059
    • 1992-04-23
    • Theodor PapenfuhsRalf Pfirmann
    • Theodor PapenfuhsRalf Pfirmann
    • C07C51/00C07C51/06C07C63/70
    • C07C51/44C07C51/38
    • A process for the preparation of 2,3,4,5,-tetrafluorobenzoic acid of the formula (1) ##STR1## by heating N'-substituted N-aminotetrafluorophthalimides of the formula (2) ##STR2## in which X is the radical ##STR3## where R.sub.1, R.sub.2 are a hydrogen atom, an alkyl-(C.sub.1 -C.sub.10)- group, aryl group, alkyl-(C.sub.1 -C.sub.6)-Co- group or aryl-CO- group, it being possible for the aryl or aryl-CO- group in the case of R.sub.1 and R.sub.2 to be substituted on the aromatic ring by fluorine and/or chlorine atoms and/or alkyl-(C.sub.1 -C.sub.4)-groups, or R.sub.1 and R.sub.2 together are a phthaloyl radical which can be substituted on the aromatic ring by 4 chlorine atoms or 4 fluorine atoms, or where X is the radical ##STR4## which can be substituted on the aromatic ring by fluorine and/or chlorine atoms and/or alkyl-(C.sub.1 -C.sub.4)- groups, in an aqueous medium at pH values of approximately -1 to approximately +1 at temperatures of approximately 160 to approximately 220.degree. C.
    • 通过加热式(2)的N-取代的N-氨基四氟邻苯二甲酰亚胺(2)制备式(1)的2,3,4,5-四氟苯甲酸的方法(1) 其中X是基团,其中R 1,R 2是氢原子,烷基 - (C 1 -C 10) - 基,芳基,烷基 - (C 1 -C 6) - 基或芳基-CO-基团, R 1和R 2在芳环上被氟和/或氯原子和/或烷基 - (C 1 -C 4) - 基团取代时,芳基或芳基-CO-基团是有可能的,或者R1和R2 一起是可以在芳环上被4个氯原子或4个氟原子取代的邻苯二甲酰基,或其中X是可以在芳环上被氟和/或氯原子和/或烷基取代的基团 - (C1-C4) - 基团,在约160至约220℃的温度下,pH值约为-1至约+ 1的水性介质中。