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    • 26. 发明授权
    • Process for preparing pyridylmethyl isothiocyanates
    • 制备吡啶基甲基异硫氰酸酯的方法
    • US6166214A
    • 2000-12-26
    • US298593
    • 1999-04-23
    • Klaus WagnerReinhard Lantzsch
    • Klaus WagnerReinhard Lantzsch
    • C07D213/36C07D213/40C07D213/61C07D249/53
    • C07D213/40C07D213/61
    • The present invention relates to a novel process for preparing pyridylmethyl isothiocyanates of the formula (I) ##STR1## in which R.sup.1 represents halogen or C.sub.1 -C.sub.4 -alkyl, characterized in that in a first step, amines of the formula (II) ##STR2## in which R.sup.1 is as defined above, are reacted with xanthogenates of the formula (III)R.sup.2 O--CS--S.sup..crclbar. M.sup..sym. (III)in whichR.sup.2 represents C.sub.1 -C.sub.4 -alkyl, preferably methyl or ethyl andM represents an alkali metal, preferably sodium and potassium or represents ammonium,if appropriate in the presence of a diluent, and in a second step, the resulting novel dithiocarbamates of the formula (IV) ##STR3## in which R.sup.1 and M are each as defined above, are oxidized, if appropriate in the presence of a diluent, to give the isothiocyanates of the formula (I).
    • 本发明涉及一种制备式(I)的吡啶基甲基异硫氰酸酯的新方法,其中R 1表示卤素或C 1 -C 4 - 烷基,其特征在于在第一步中,式(II)的胺其中R1为 与式(III)R2O-CS-S( - )M(+)(III)的黄原酸酯反应,其中R 2表示C 1 -C 4烷基,优选甲基或乙基,M表示碱金属,优选 钠和钾,或代表铵,如果合适,在稀释剂存在下,并且在第二步中,得到的式(Ⅳ)的新型二硫代氨基甲酸酯,其中R 1和M如上所定义,如果适用,则在 存在稀释剂,得到式(I)的异硫氰酸酯。