Process for the preparation of methyliminoisobutyrate hydrochloride
    1.
    发明授权
    Process for the preparation of methyliminoisobutyrate hydrochloride 失效
    制备甲基亚氨基异丁酸盐酸盐的方法

    公开(公告)号:US4111976A

    公开(公告)日:1978-09-05

    申请号:US865099

    申请日:1977-12-27

    CPC分类号: C07C257/06

    摘要: A process is provided for preparing methyliminoisobutyrate hydrochloride by reacting isobutyronitrile (IBN), hydrogen chloride (HCl) and methanol in the presence of excess HCl, wherein the IBN and HCl are added at a temperature from about 5.degree. C to about 25.degree. C to a methanolic solution containing excess HCl and by maintaining during the reaction a methanolic reaction medium saturated with HCl.

    摘要翻译: 提供了通过使异丁腈(IBN),氯化氢(HCl)和甲醇在过量HCl的存在下反应制备甲基亚氨基异丁酸盐酸盐的方法,其中IBN和HCl在约5℃至约25℃的温度下加入到 含有过量HCl的甲醇溶液,并且在反应期间保持用HCl饱和的甲醇反应介质。

    Process for the production of thiophosphoric acid esters
    3.
    发明授权
    Process for the production of thiophosphoric acid esters 失效
    硫代磷酸酯的制备方法

    公开(公告)号:US4326059A

    公开(公告)日:1982-04-20

    申请号:US161475

    申请日:1980-06-20

    IPC分类号: A01N57/16 C07F9/6512 C07F9/65

    CPC分类号: C07F9/65125 A01N57/16

    摘要: An improved process for the production of dialkoxy phosphoric acid esters of substituted hydroxypyrimidines which involves reacting a dialkyl phosphoric acid halide with a substituted hydroxypyrimidine reaction in a two-step reaction is disclosed. In reaction step (a) the hydroxypyrimidine derivative is converted with the aid of sodium hydroxide and in the presence of a hydrocarbon solvent and a phase-transfer catalyst to the sodium salt while drying the reaction mixture by azeotropically removing water. In step (b) the condensation process is carried out at room temperature to about 100.degree. C. The condensation step may be accelerated by addition of 4-bis(C.sub.1 to C.sub.4 alkyl)aminopyridine as catalyst.

    摘要翻译: 公开了一种用于制备取代羟基嘧啶的二烷氧基磷酸酯的改进方法,其涉及使二烷基磷酰卤与取代的羟基嘧啶反应在两步反应中反应。 在反应步骤(a)中,羟基嘧啶衍生物在氢氧化钠的帮助下,在烃溶剂和相转移催化剂的存在下转化为钠盐,同时通过共沸除去水来干燥反应混合物。 在步骤(b)中,缩合过程在室温至约100℃下进行。可以通过加入4-双(C1-C4烷基)氨基吡啶作为催化剂来加速缩合步骤。