VERFAHREN ZUR HERSTELLUNG VON 5-HALO-2,4,6-TRIFLUORISOPHTHALSÄURE

    公开(公告)号:EP1863752A1

    公开(公告)日:2007-12-12

    申请号:EP06725104.1

    申请日:2006-03-16

    CPC classification number: C07C25/13 C07C17/23 C07C17/363 C07C51/08 C07C63/68

    Abstract: The invention relates to a method for producing 5-halo-2,4,6-trifluoroisophthalic acid of formula (I), wherein X represents F, Cl, Br, or I, by hydrolysis of 5-halo-2,4,6-trifluoroisophthalodinitrile of formula (II). Said invention is characterised in that in a first step, isophthalodinitrile (II) or a solution containing isophthalodinitrile (II) is reacted with a concentrated sulphuric acid at room temperature in order to form a 5-haIo-2,4,6-trifluoroisophthalodiamide of general formula (III), and is, subsequently, heated and in a second step, isophthalic acid (I) is produced after additional heating and addition of water.

    Abstract translation: 本发明涉及通过5-卤代-2,4,6,6-四氢吡啶的水解制备式(I)的5-卤代-2,4,6-三氟间苯二甲酸的方法,其中X代表F,Cl,Br或I (II)的三氟间苯二甲腈。 所述发明的特征在于,在第一步中,异佛尔酮二腈(II)或含有间苯二甲腈(II)的溶液在室温下与浓硫酸反应,以形成5-卤-2,4,6-三氟间苯二甲酰二胺 通式(III),随后加热,并且在第二步中,间苯二甲酸(I)在额外加热和加入水之后生成。

    VERFAHREN ZUR HERSTELLUNG VON O-CHLORMETHYLBENZOESÄURECHLORIDEN

    公开(公告)号:EP1265837A2

    公开(公告)日:2002-12-18

    申请号:EP00977582.6

    申请日:2000-11-27

    CPC classification number: C07C51/60 C07C63/10

    Abstract: The invention relates to a method for producing o-chloromethyl benzoic acid chlorides of formula (I), in which R1 to R4 can be the same or different and represent hydrogen C¿1?-C4 alkyl, halogen or trifluoromethyl, by reacting benzo-condensed lactones of formula (II), in which R?1 to R4¿ have the above-mentioned meaning, with thionyl chloride. The inventive method is characterized in that the reaction is carried out in the presence of catalytic quantities of a Lewis acid and in the presence of catalytic quantities of a phosphine derivative.

    Abstract translation: 本发明涉及制备式(I)的邻氯甲基苯甲酰氯的方法,其中R 1至R 4可以相同或不同并表示氢C 1 -C 4烷基,卤素或三氟甲基, 其中R 1至R 4具有上述含义的式(II)的缩合内酯与亚硫酰氯反应。 本发明的方法的特征在于反应在催化量的路易斯酸存在下和在催化量的膦衍生物存在下进行。

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