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    • 4. 发明授权
    • 2-chloroalkyl carbodimiides and a method of preparation
    • 2-氯代胆碱酯及其制备方法
    • US3754032A
    • 1973-08-21
    • US3754032D
    • 1970-09-29
    • DOW CHEMICAL CO
    • TOMALIA DGIACOBBE T
    • C07D203/20C07C119/00
    • C07D203/20
    • NOVEL CARBODIMIDES OF THE FORMULA

      X-C(-R1)(-R2)-CH2-N=C=N-R3

      WHEREIN X IS CHLORO OR BROMO, R1 AND R2 ARE HYDROGEN OR LOWER ALKYL, AND R3 IS A HYDROCARBYL OR A HALO- OR NITROSUBSTITUTED HYDROCARBYL RADICAL, ARE DISCLOSED. THE CARBODIMIDES ARE PREPARED BY REACTING (A) AN AZIRIDINE OF THE FORMULA

      HN
      WITH (B) AN ISOCYANIDE OF THE FORMULA

      R3-N=CX2.

      NOVEL 1-AZIRIDINECARBOXIMIDOYL HALIDES OF THE FORMULA

      R3-N=C(-X)-N
      ARE PREPARED ASS INTERMEDIATES IN THE PROCESS WHEN THE PROCESS IS CONDUCTED IN THE PRESENCE OF AN ACID ACCEPTOR, E.G. TTRIETHYLAMINE. SUCH INTERMEDIATES REARRANGE UPON WARNING, OR IN THE PRESENCE OF AN ACID, TO FORM THE CORRESPONDING CARBODIIMIDE. THE SUBJECT CARBONIIMIDES CAN BE HOMOPOLYMERIZED TO GIVE POLYMERS BEARING REACTIVE CHLOROALKYL GROUPS WHICH ARE THEMSELVES USEFUL AS CHELATING AGEENTS OR CAN BE. FURTHER REACTED WITH AMMONIA OR OTHER AMINES TO GIVEE QUATERNARY AMMONIUM-BEARING POLYMERS WHICH ARE USEFUL AS ION EXCHANGE RESINS OR CAN BE COPOLYMERIZEDD WITH OTHER KNOWN CARBODIMIDES TO FORM SIMILARLY USEFUL POLYMERS.