Preparation of acyl chlorides
    61.
    发明授权
    Preparation of acyl chlorides 失效
    酰氯的制备

    公开(公告)号:US5166427A

    公开(公告)日:1992-11-24

    申请号:US719722

    申请日:1991-06-24

    IPC分类号: C07C51/60

    CPC分类号: C07C51/60

    摘要: Acyl chlorides of the general formula ##STR1## where R is C.sub.8 -C.sub.30 -alkyl, C.sub.8 -C.sub.30 -alkenyl or C.sub.8 -C.sub.30 -alkynyl, are prepared from a carboxylic acid of the general formula II ##STR2## where R has the abovementioned meanings, and phosgene, COCl.sub.2 (III), in the presence of a catalyst adduct of phosgene and N,N-dialkylformamide of the general formula IV ##STR3## where R.sup.1 and R.sup.2 independently of one another are each C.sub.1 -C.sub.3 -alkyl, preferably a 1:1 adduct in excess N,N-dialkylformamide, the reaction product I being obtained by phase separation, by a process in which II and III are used in essentially equimolar amounts and the phase containing the catalyst adduct is reused.

    摘要翻译: 由通式II的羧酸(II)制备通式为其中R为C 8 -C 30 - 烷基,C 8 -C 30 - 烯基或C 8 -C 30 - 炔基的酰基氯, 其中R具有上述含义,和光气,COCl 2(III),在光气和N,N-二烷基甲酰胺的通式IV(IV)的催化剂加合物存在下,其中R 1和R 2彼此独立地是 每个C1-C3-烷基,优选过量的N,N-二烷基甲酰胺的1:1加合物,反应产物I通过相分离获得,其中II和III以基本上等摩尔量使用,并且含有 催化剂加合物被重复使用。

    Preparation of 1-hydroxyimidazole
    62.
    发明授权
    Preparation of 1-hydroxyimidazole 失效
    1-羟基咪唑的制备

    公开(公告)号:US5112985A

    公开(公告)日:1992-05-12

    申请号:US586947

    申请日:1990-09-24

    摘要: The preparation of 1-hydroxyimidazoles of the formula I ##STR1## where the R radicals can be identical or different and are each halogen or an organic radical, it also being possible for vicinal radicals to be connected to form an aromatic or nonaromatic ring of from 3 to 12 carbon atoms, and n is from 0 to 3, entails reacting an imidazole of the formula II ##STR2## where Q is preferably hydrogen or, especially where R is not halogen, an alkali metal or alkaline earth metal cation, with an organic peroxide.The products are valuable intermediates for organic syntheses.

    摘要翻译: 制备式I(I)的1-羟基咪唑,其中R基团可以相同或不同,各自为卤素或有机基团,连接基团可连接形成芳族或非芳族化合物 3至12个碳原子的环,n为0至3,使式II(II)的咪唑与Q优选为氢或特别是其中R不是卤素的碱金属或碱 土壤金属阳离子,有机过氧化物。 该产品是有机合成的有价值的中间体。

    Preparation of 4-chloropyrazoles
    64.
    发明授权
    Preparation of 4-chloropyrazoles 失效
    4-氯吡唑的制备

    公开(公告)号:US5047551A

    公开(公告)日:1991-09-10

    申请号:US429783

    申请日:1989-10-30

    IPC分类号: C07D231/16

    CPC分类号: C07D231/16

    摘要: 4-Chloropyrazoles of the general formula I ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are each independently of the others hydrogen or a radical which is inert under the reaction conditions, are prepared by reacting pyrazoles of the general formula II ##STR2## wherein R.sup.1, R.sup.2 and R.sup.3 are each as defined above, with 0.95-10 equivalents of hypochloric acid, or salts thereof, in the substantial absence of any carboxylic acid.

    摘要翻译: 通式Ⅰ(I)的4-氯吡唑,其中R 1,R 2和R 3各自独立地为氢或在反应条件下为惰性的基团,通过使通式II的吡唑与< (II)其中R 1,R 2和R 3各自如上所定义,与0.95〜10当量的次氯酸或其盐基本上不存在任何羧酸。