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    • 13. 发明授权
    • Preparation of dialkyl (N-cyanoimido)carbonates from dialkyl
imidocarbonates and cyanogen halides
    • 由二烷基亚氨基碳酸酯和氰卤化物制备二烷基(N-氰基亚氨基)碳酸酯
    • US5237084A
    • 1993-08-17
    • US823518
    • 1992-01-21
    • Michael A. OliverWard H. Oliver
    • Michael A. OliverWard H. Oliver
    • C07C271/68
    • C07C271/68
    • Dialkyl (N-cyanoimido) carbonates are prepared in good yield in a non-aqueous solvent by a process which comprises either (a) adding a cyanogen halide at a controlled rate to a reactor containing an unsubstituted or substituted dialkyl imidocarbonate, an inorganic base and/or a trialkyl amine, or (b) by adding a trialkyl amine to a solution of the unsubstituted or substituted dialkyl imidocarbonate and a cyanogen halide. The dialkyl imidocarbonate precursors are prepared by using a stoichiometric ratio (2:1) of alcohol to cyanogen halide in the presence of an acid acceptor and in a non-aqueous solvent.Dialkyl (N-cyanoimido)carbonates are useful as intermediates for pesticides and pharmaceuticals.
    • 在非水溶剂中通过以下方法制备二烷基(N-氰基亚氨基)碳酸酯,该方法包括(a)以受控的速率将氰卤化物加入到含有未取代或取代的亚氨基碳酸二烷基酯的无机碱的反应器中, /或三烷基胺,或(b)通过将三烷基胺加入到未取代或取代的酰亚胺碳酸二烷基酯和氰卤化物的溶液中。 通过在酸受体和非水溶剂的存在下,使用化学计量比(2:1)的醇与氰卤化物来制备二烷基亚氨碳酸酯前体。 二烷基(N-氰基亚氨基)碳酸酯可用作农药和药物的中间体。