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    • 8. 发明授权
    • Method of preparing N-methylphosphonic acid diesters of acrylic and
methacrylic acid amines from methylol
    • 从羟甲基制备丙烯酸和甲基丙烯酸胺的N-甲基膦酸二酯的方法
    • US4774349A
    • 1988-09-27
    • US918051
    • 1986-10-14
    • Klaus LangerbeinsWerner Ude
    • Klaus LangerbeinsWerner Ude
    • C07F9/38C07F9/40
    • C07F9/4006
    • A process for the preparation of (meth)acrylamidomethylphosphonic acid diesters of formula I:H.sub.2 C.dbd.C(R.sub.1)--CO--N(R.sub.2)--CH.sub.2 --P(O)(OR.sub.3)(OR.sub.4) (I)is disclosed. In the above formula, R.sub.1 is a hydrogen atom or methyl group. R.sub.2 is a hydrogen atom, a C.sub.1 -C.sub.4 alkyl group (which can be substituted) or a C.sub.3 -C.sub.4 alkenyl group. R.sub.3 and R.sub.4 are each independently a phenyl group, or an alkyl group (which can be substituted) having 1-4 C atoms. Or R.sub.3 and R.sub.4 together form an alkylene group which forms a 5- or 7-membered ring with the oxygen atoms and the phosphorus atoms.The process is based on reacting a N-methylol derivative of (meth)acrylamide with a phosphorous acid triester, in which a N-methylol ether of a (meth)acrylamide is used. The reaction can be advantageously catalyzed by Lewis acids.
    • 公开了制备式I的(甲基)丙烯酰胺甲基膦酸二酯的方法:H 2 C = C(R 1)-CO-N(R 2)-CH 2 -P(O)(OR 3)(OR 4)(I))。 在上式中,R 1为氢原子或甲基。 R2是氢原子,C1-C4烷基(可以被取代)或C3-C4烯基。 R 3和R 4各自独立地为苯基或具有1-4个C原子的烷基(可以被取代)。 或者R3和R4一起形成与氧原子和磷原子形成5-或7-元环的亚烷基。 该方法基于(甲基)丙烯酰胺的N-羟甲基衍生物与亚磷酸三酯反应,其中使用(甲基)丙烯酰胺的N-羟甲基醚。 反应可以有利地被路易斯酸催化。