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    Process for the preparation of 2-chloro-4-methylphenol
    32.
    发明授权
    Process for the preparation of 2-chloro-4-methylphenol 失效
    2-氯-4-甲基苯酚的制备方法

    公开(公告)号：US5847236A

    公开(公告)日：1998-12-08

    申请号：US710990

    申请日：1996-09-25

    Applicant: Franz-Josef Mais ,  Helmut Fiege

    Inventor： Franz-Josef Mais ,  Helmut Fiege

    IPC: B01J31/02 ,  C07C37/62 ,  C07C39/28

    CPC classification number: B01J31/0218 ,  B01J31/26 ,  B01J31/30 ,  C07C37/62

    Abstract: 2-Chloro-4-methylphenol is prepared by reacting 4-methylphenol with a chlorinating agent in the presence of a catalyst system of one or more Lewis acids in a total amount of 0.1-10% by weight and one or more diaryl sulphides in a total amount of 0.1-10% by weight, all based on the amount of 4-methylphenol. The reaction temperature is 0.degree.-100.degree. C. The chlorinating agent is used in an amount of 0.5-1.5 mol per mole of 4-methylphenol. The reaction can be carried out until virtually complete consumption of the 4-methylphenol, high isomeric selectivity and high stage selectivity being observed.

    Abstract translation: 2-氯-4-甲基苯酚是通过使4-甲基苯酚与氯化剂在总量为0.1-10重量％的一种或多种路易斯酸的催化剂体系存在下反应来制备的，一种或多种二芳基硫化物在 总量为0.1-10重量％，均基于4-甲基苯酚的量。 反应温度为0℃-100℃。氯化剂的用量为每摩尔4-甲基苯酚0.5-1.5摩尔。 反应可以进行直到几乎完全消耗4-甲基苯酚，高异构选择性和高阶段选择性被观察到。

    Process for the preparation of isobenzofurandiones
    34.
    发明授权
    Process for the preparation of isobenzofurandiones 失效
    异苯并呋喃二酸的制备方法

    公开(公告)号：US5672719A

    公开(公告)日：1997-09-30

    申请号：US528388

    申请日：1995-09-13

    Applicant: Josef Kasbauer ,  Helmut Fiege

    Inventor： Josef Kasbauer ,  Helmut Fiege

    IPC: C07D307/89 ,  B01J23/42 ,  B01J23/44 ,  C07B61/00 ,  C07C51/377 ,  C07D307/77

    CPC classification number: C07C51/377

    Abstract: Isobenzofurandiones are obtained in particularly advantageous manner by the dehydrogenation of tetrahydroisobenzofurandiones in the presence of catalysts at elevated temperature by a process in which distilled tetrahydro-isobenzofurandiones are heated to temperatures of between 120.degree. and 300.degree. C. in the presence of supported palladium and/or platinum catalysts and in the presence of maleic acid derivatives in a trickle-phase or liquid-phase procedure, the temperature in the liquid-phase procedure being increased at a rate of 0.6.degree. to 3.degree. C. per minute above 80.degree. to 110.degree. C.

    Abstract translation: 通过在催化剂存在下，在升高的温度下，通过四氢异苯并呋喃二酸脱氢的方法，通过在负载的钯和/或碱存在下将蒸馏的四氢异苯并呋喃二酸加热至120-300℃的温度， 或铂催化剂，并且在涓流或液相方法中存在马来酸衍生物时，液相方法中的温度以每分钟高于80℃至110℃的速度增加至110℃ DEG C.

    Process for the preparation of methylene compounds and the novel compound 2-(2,4-Dichloro-5-fluorobenzyl)thiophene
    36.
    发明授权
    Process for the preparation of methylene compounds and the novel compound 2-(2,4-Dichloro-5-fluorobenzyl)thiophene 失效
    制备亚甲基化合物和新化合物2-（2,4-二氯-5-氟苄基）噻吩的方法

    公开(公告)号：US5591869A

    公开(公告)日：1997-01-07

    申请号：US568050

    申请日：1995-12-06

    Applicant: Helmut Fiege ,  Ferdinand Hagedorn

    Inventor： Helmut Fiege ,  Ferdinand Hagedorn

    IPC: C07B31/00 ,  C07C1/32 ,  C07C17/35 ,  C07D307/38 ,  C07D333/08 ,  C07D333/12

    CPC classification number: C07D307/38 ,  C07B31/00 ,  C07D333/08 ,  C07D333/12

    Abstract: Methylene compounds are preferably prepared by reducing an aluminum halide complex of the formula ##STR1## in which R.sup.1 represents a C.sub.6 -C.sub.10 -aryl radical which is optionally substituted by 1 to 4 C.sub.1 -C.sub.4 -alkyl radicals, 1 to 4 fluorine, chlorine and/or bromine atoms, one C.sub.1 -C.sub.8 -alkoxy group and/or one acetoxy group, or represents a heteroaryl radical which is optionally substituted by one C.sub.1 -C.sub.4 -alkyl radical and/or one fluorine, chlorine or bromine atom and contains 5 to 10 C atoms and one O or S atom andR.sup.2 represents a C.sub.1 -C.sub.12 -alkyl radical which is optionally substituted by 1 to 5 fluorine, chlorine and/or bromine atoms, independently of R.sup.1 represents a radical as defined for R.sup.1 and, in the case where R.sup.1 =a C.sub.6 -C.sub.10 -aryl radical which is substituted by 1 to 4 fluorine, chlorine and/or bromine atoms, also represents a furyl or thienyl radical,Y represents fluorine, chlorine or bromine,with an amineborane of the formula ##STR2## in which R.sup.3 represents C.sub.1 -C.sub.4 -alkyl andR.sup.4 represents hydrogen or C.sub.1 -C.sub.4 -alkyl and/orwith sodium borohydride and/or with potassium borohydride.2-(2,4-Dichloro-5-fluorobenzyl)thiophene is obtainable in this way for the first time.

    Abstract translation: 亚甲基化合物优选通过还原任选被1至4个C 1 -C 4烷基，1至4个氟，氯和/或溴原子，一个C 1 -C 8 - 烷氧基取代的式偕基的卤化铝配合物 和/或一个乙酰氧基，或表示任选被一个C 1 -C 4 - 烷基和/或一个氟，氯或溴原子取代且含有5至10个C原子和一个O或S原子且R 2表示 任选被1至5个氟，氯和/或溴原子取代的C1-C12-烷基，独立于R1表示对R1定义的基团，并且在R1 = C6-C10芳基的情况下，其中 被1至4个氟，氯和/或溴原子取代，也代表呋喃基或噻吩基，Y代表氟，氯或溴，与式（III）的胺硼烷反应，其中R 3表示C 1 -C 4 - 烷基和R 4表示氢或C 1 -C 4烷基和/或与硼氢化钠 ydride和/或用硼氢化钾。 2-（2,4-二氯-5-氟苄基）噻吩可以首次以这种方式获得。

    Process for isolating M-dichlorobenzene from mixtures of dichlorobenzene isomers
    39.
    发明授权
    Process for isolating M-dichlorobenzene from mixtures of dichlorobenzene isomers 失效
    从二氯苯异构体的混合物中分离M-二氯苯的方法

    公开(公告)号：US5436377A

    公开(公告)日：1995-07-25

    申请号：US300614

    申请日：1994-09-02

    Applicant: Michael Pies ,  Kai Rohlk ,  Helmut Lahr ,  Helmut Fiege

    Inventor： Michael Pies ,  Kai Rohlk ,  Helmut Lahr ,  Helmut Fiege

    IPC: C07C17/392 ,  C07C25/08

    CPC classification number: C07C17/392

    Abstract: In a particularly advantageous process for isolating m-dichlorobenzene from mixtures of dichlorobenzene isomers by crystallization as eutectic crystals using a processing aid, the processing aid used is a compound of the formula (I) ##STR1## in which R.sup.1 to R.sup.6 are, independently of one another, hydrogen, halogen, C.sub.1 -C.sub.4 -alkyl, hydroxyl, NH.sub.2 or R--CO-- having R=C.sub.1 -C.sub.4 -alkyl,with 1-bromo-4-chlorobenzene and 1,4-dibromobenzene being excepted.

    Abstract translation: 在使用加工助剂通过结晶作为共晶晶体从二氯苯异构体的混合物中分离间二氯苯的特别有利的方法中，所用的加工助剂是式（I）化合物，其中R 1至R 6为 独立地是具有R = C 1 -C 4 - 烷基的氢，卤素，C 1 -C 4 - 烷基，羟基，NH 2或R-CO-，除了1-溴-4-氯苯和1,4-二溴苯外。

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