Process for preparing phthalides
    3.
    发明授权
    Process for preparing phthalides 失效
    制备苯酞的方法

    公开(公告)号:US6147227A

    公开(公告)日:2000-11-14

    申请号:US269773

    申请日:1999-04-01

    CPC classification number: C07D307/88

    Abstract: A process for preparing phthalides of the general formula I, ##STR1## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently hydrogen, C.sub.1-C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy, by hydrogenating phthalic anhydrides of the general formula II, ##STR2## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each as defined above, with hydrogen in the presence of suspended catalysts of the Raney type in a hydrogenation apparatus by using a mixing apparatus to mix a liquid phase, which includes the catalyst and the phthalic anhydride used and resulting phthalide, and a gas phase, which includes the hydrogenating hydrogen, comprises using the mixing apparatus to introduce a mixing intensity of at least 50 W/l into the liquid phase.

    Abstract translation: PCT No.PCT / EP97 / 05186 Sec。 371日期1999年4月1日 102(e)1999年4月1日PCT 1997年9月22日PCT公布。 公开号WO98 / 14441 日期:1998年4月9日制备通式Ⅰ的邻苯二甲酸酯的方法,其中R 1,R 2,R 3和R 4独立地是氢,C 1 -C 4烷基或C 1 -C 4烷氧基,通过氢化通式Ⅱ的邻苯二甲酸酐, 其中R 1,R 2,R 3和R 4各自如上定义,在氢化装置中,在阮内型悬浮催化剂存在的情况下,通过使用混合装置将包含催化剂和所用邻苯二甲酸酐的液相 并且所得的苯并呋喃酮和包括氢化氢的气相包括使用混合装置将至少50W / l的混合强度引入液相。

    Preparation of 4-substituted imidazoles from
N-formyl-.alpha.-aminonitrile
    5.
    发明授权
    Preparation of 4-substituted imidazoles from N-formyl-.alpha.-aminonitrile 失效
    从N-甲酰基-α-氨基腈制备4-取代的咪唑

    公开(公告)号:US5359082A

    公开(公告)日:1994-10-25

    申请号:US36032

    申请日:1993-03-23

    Abstract: A process for the preparation of 4-substituted imidazoles of the general formula ##STR1## in which R denotes C.sub.1 -C.sub.20 alkyl, C.sub.3 -C.sub.20 cycloalkyl, aryl, and C.sub.7 -C.sub.20 aralkyl,whereina) N-formyl-.alpha.-aminonitriles of the general formula I ##STR2## in which R has the meanings stated above and A stands for carbonyl, are reacted, at a temperature ranging from 20.degree. to 200.degree. C. and a pressure ranging from 20 to 500 bar, with hydrogen in the presence of hydrogenation catalysts andb) the resulting N-formyl-1,2-diamines of the general formula ##STR3## in which R and A have the meanings stated above and n stands for 0 or 1, are reacted over a cyclization/dehydrogenation catalyst at a temperature ranging from 200.degree. to 600.degree. C. and a pressure ranging from 0.001 to 5 bar.

    Abstract translation: 制备通式为(I)的4-取代咪唑的方法,其中R表示C 1 -C 20烷基,C 3 -C 20环烷基,芳基和C 7 -C 20芳烷基,其中a)N-甲酰基-α 其中R具有上述含义并且A代表羰基的通式I (II)的氨基腈在20℃至200℃的温度和20至500℃的压力下反应 在氢化催化剂的存在下用氢气b)所得的通式(III)的N-甲酰基-1,2-二胺其中R和A具有上述含义,n代表0或 1在环化/脱氢催化剂上在200至600℃的温度和0.001至5巴的压力下反应。

    Process for preparing phthalides
    7.
    发明授权
    Process for preparing phthalides 失效
    制备苯酞的方法

    公开(公告)号:US6028204A

    公开(公告)日:2000-02-22

    申请号:US202478

    申请日:1998-12-16

    CPC classification number: C07D307/88

    Abstract: The disclosure is a process for preparing a phthalide of the general formula I ##STR1## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each independently of the others hydrogen, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy, by catalytic hydrogenation of a phthalic anhydride of the general formula II ##STR2## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each as defined above, in a solvent, which comprises using said phthalide I, the reaction product of the catalytic hydrogenation, as solvent.

    Abstract translation: PCT No.PCT / EP97 / 03137 Sec。 371日期1998年12月16日第 102(e)日期1998年12月16日PCT提交1997年6月17日PCT公布。 公开号WO98 / 01437 日期1998年1月15日本公开是一种制备通式Ⅰ的苯酞的方法,其中R 1,R 2,R 3和R 4各自独立地为氢,C 1 -C 4 - 烷基或C 1 -C 4烷氧基,通过催化氢化 的通式II的邻苯二甲酸酐,其中R 1,R 2,R 3和R 4各自如上所定义,在溶剂中,其包括使用所述苯乙酸酯I,催化氢化的反应产物作为溶剂。

    Removal of halides from halide-containing nitrile mixtures
    10.
    发明授权
    Removal of halides from halide-containing nitrile mixtures 失效
    从含卤素腈混合物中除去卤化物

    公开(公告)号:US6153784A

    公开(公告)日:2000-11-28

    申请号:US24457

    申请日:1998-02-17

    CPC classification number: C07C253/14 C07C209/48 C07C253/34

    Abstract: Halides are removed from halide-containing nitrile mixtures by(a) thermally treating the halide-containing nitrile mixture,(b) subsequently adding a base to the thermally treated nitrile mixture and(c) subsequently separating off the base from the nitrile mixture.Amines are prepared by(A) reacting alkyl halides with metal cyanides in an at least two-phase reaction medium in the presence of halide-containing phase-transfer catalysts to give alkanenitriles,(B) separating off the resulting halide-containing alkanenitrile mixture phase and(C) further treating the halide-containing alkanenitrile mixture phase, as described in the stages(a)-(c) removing halides from halide-containing nitrile mixtures and(d) hydrogenating nitrites obtained in stage (c) to give amines, in the presence of suspended or fixed-bed catalysts.

    Abstract translation: 通过(a)热处理含卤素腈混合物,(b)随后向经热处理的腈混合物中加入碱,和(c)随后将腈与腈混合物分离,从卤化物腈混合物中除去卤化物。 胺通过(A)在卤化物相转移催化剂存在下在至少两相反应介质中将烷基卤与金属氰化物反应得到烷腈,(B)将所得的含卤素的烷腈混合物相分离 (C)进一步处理含卤化物的腈腈混合物相,如步骤(a) - (c)所述从卤化物腈混合物中除去卤化物,和(d)氢化阶段(c)中得到的亚硝酸盐,得到胺, 在悬浮或固定床催化剂存在下。

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