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    • 9. 发明授权
    • Preparation of acyl cyanides
    • 酰基氰的制备
    • US4455264A
    • 1984-06-19
    • US436094
    • 1982-10-22
    • Kurt FindeisenEckart Kranz
    • Kurt FindeisenEckart Kranz
    • C07C20060101C07C255/45C07C255/56C07D253/06C07C120/00C07C121/34C07C121/76
    • C07C253/16
    • Acyl cyanides of the formula ##STR1## in which R represents an optionally substituted alkyl group having 1 to 8 carbon atoms, an optionally substituted cycloalkyl group having 3 to 12 carbon atoms or an optionally substituted aryl group, or an optionally substituted 5-membered or 6-membered heterocyclic radical which additionally can be fused to a benzene ring,are obtained in high yields by reacting carboxylic acid anhydrides of the formula R--CO--O--CO--R (II) with trimethylsilyl cyanide, (CH.sub.3).sub.3 Si--CN (III), if appropriate in the presence of a catalyst and, if appropriate, in the presence of a diluent, at a temperature between 50.degree. and 250.degree. C. The acyl cyanides can be used as intermediate products, for example, for the preparation of certain herbicidally active compounds of the triazinone series.
    • 其中R表示任选取代的具有1至8个碳原子的烷基,任选取代的具有3至12个碳原子的环烷基或任选取代的芳基,或任选取代的5元或 通过使式R-CO-O-CO-R(II)的羧酸酐与三甲基甲硅烷基氰化物,(CH 3)3 Si-CN(III)反应,可以高收率地获得另外可以与苯环稠合的6元杂环基 (III),如果合适的话,在催化剂的存在下,如果合适的话,在稀释剂的存在下,在50℃和250℃之间的温度下。酰基氰可以用作中间产物,例如用于 制备三嗪酮系列的某些除草活性化合物。