Method for producing 4,6-dichloropyrimidine with sulfur compounds and phosphorus compounds
    3.
    发明授权
    Method for producing 4,6-dichloropyrimidine with sulfur compounds and phosphorus compounds 失效
    用硫化合物和磷化合物生产4,6-二氯嘧啶的方法

    公开(公告)号:US06525198B1

    公开(公告)日:2003-02-25

    申请号:US10069089

    申请日:2002-02-07

    IPC分类号: C07D23930

    CPC分类号: C07D239/30

    摘要: The invention relates to a method for the preparation of 4,6-dichloropyrimidine by reacting 4-chloro-6-methoxypyrimidine with at least one sulphur-containing chlorinating agent selected from the group consisting of SCl2, SOCl2, and SO2Cl2 in the presence of at least one phosphorus compound having the formula R3P═Yn  (1), in which R represents C1-C10-alkyl or C6-C10-aryl, each of which may optionally be substituted by up to five identical or different substituents selected from the group consisting of fluorine, chlorine, bromine, C1-C4-alkyl, and C1-C4-alkoxy, Y represents oxygen or sulphur, and n represents zero or 1.

    摘要翻译: 本发明涉及通过使4-氯-6-甲氧基嘧啶与至少一种选自SCl 2,SOCl 2和SO 2 Cl 2的含硫氯化剂在存在下进行反应来制备4,6-二氯嘧啶的方法 至少一种具有式(I)的磷化合物,其中R表示C 1 -C 10 - 烷基或C 6 -C 10 - 芳基,其各自可任选被至多五个相同或不同的选自氟,氯,溴,C1- C 4 - 烷基和C 1 -C 4 - 烷氧基,Y表示氧或硫,并且n表示0或1。

    Process for the preparation of 2-chloroacrylonitrile
    4.
    发明授权
    Process for the preparation of 2-chloroacrylonitrile 失效
    制备2-氯丙烯腈的方法

    公开(公告)号:US5679826A

    公开(公告)日:1997-10-21

    申请号:US735717

    申请日:1996-10-23

    CPC分类号: C07C253/30

    摘要: 2-Chloroacrylonitrile is prepared in a particularly advantageous and readily industrially practicable manner by chlorinating acrylonitrile and then thermally cleaving the 2,3-diehloropropionitrile formed, by chlorinating acrylonitrile in the presence of a catalyst system comprising dimethylformamide and pyridine and/or pyridine derivatives and subjecting the resulting crude 2,3-dichloropropionitrile to thermal cleavage in the presence of the same catalyst system without the addition of further catalysts.

    摘要翻译: 通过氯化丙烯腈,然后在包含二甲基甲酰胺和吡啶和/或吡啶衍生物的催化剂体系存在下,通过氯化丙烯腈热分解形成的2,3-二氯丙腈,制备2-氯丙烯腈, 所得粗制的2,3-二氯丙腈在相同的催化剂体系的存在下进行热裂解而不加入另外的催化剂。

    Method for preparing acetophenones with a fluoralkyl-substituted aromatic nucleus
    9.
    发明授权
    Method for preparing acetophenones with a fluoralkyl-substituted aromatic nucleus 有权
    用氟烷基取代的芳香核制备苯乙酮的方法

    公开(公告)号:US06184417B2

    公开(公告)日:2001-02-06

    申请号:US09403962

    申请日:1999-11-01

    IPC分类号: C07C4500

    CPC分类号: C07C45/00 C07C49/80

    摘要: Acetophenones which are substituted on the aromatic ring by fluoroalkyl are prepared in a particularly advantageous, environmentally friendly and effective manner from fluoroalkylanilines and acetaldoxime by preparing from a fluoroalkylaniline a corresponding diazonium salt solution, and reacting this with acetaldoxime in the presence of at least one copper compound, without adding any buffer salts or reducing agents, carrying out the reaction at from 20 to 50° C. and in the presence of halide ions and subsequently heating to a temperature in the range from 70 to 110° C.

    摘要翻译: 通过氟代烷基在芳环上被取代的苯乙酮由氟代烷基苯胺和乙醛肟制备成特别有利的环境友好和有效的方法,通过从氟烷基苯胺制备相应的重氮盐溶液,并在至少一种铜存在下使其与乙醛肟反应 化合物,而不添加任何缓冲盐或还原剂,在20至50℃下进行反应,并在卤离子存在下,随后加热至70至110℃的温度。

    Method of preparing 4,5,6-trichloro- and 2,4,5,6-tetrachloropyrimidine
    10.
    发明授权
    Method of preparing 4,5,6-trichloro- and 2,4,5,6-tetrachloropyrimidine 失效
    制备4,5,6-三氯 - 和2,4,5,6-四氯嘧啶的方法

    公开(公告)号:US6162917A

    公开(公告)日:2000-12-19

    申请号:US194983

    申请日:1998-12-07

    IPC分类号: C07C255/24 C07D239/30

    CPC分类号: C07D239/30 C07C255/24

    摘要: The invention relates to a process for the preparation of 4,5,6-trichloro- and 2,4,5,6-tetrachloropyrimidine starting from 3-dimethylamino-propionitrile, to its use and also to a crystalline intermediate product form.

    摘要翻译: PCT No.PCT / EP97 / 02933 371日期1998年12月7日第 102(e)日期1998年12月7日PCT提交1997年6月6日PCT公布。 公开号WO97 / 47605 日期:1997年12月18日本发明涉及从3-二甲基氨基 - 丙腈开始制备4,5,6-三氯 - 和2,4,5,6-四氯嘧啶的方法,其用途和结晶中间体 产品形式。