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    • 7. 发明授权
    • Preparation of alkoxy maleic anhydrides
    • 制备烷氧基马来酸酐
    • US4877887A
    • 1989-10-31
    • US189297
    • 1988-05-02
    • Rainer BeckerWolfgang Rohr
    • Rainer BeckerWolfgang Rohr
    • C07D307/60C07C59/58C07D207/44C07D207/456C08F283/08
    • C07D207/456C07C59/58
    • The invention relates to novel alkoxy substituted maleimides of the formula ##STR1## where R.sup.1 is hydrogen, C.sub.1 -C.sub.8 -alkyl, C.sub.2 -C.sub.8 -alkenyl, phenyl or phenylalkyl, and the organic radicals may furthermore carry inert substituents, and R.sup.2 and R.sup.3 are each C.sub.1 -C.sub.4 -alkyl, C.sub.2 -C.sub.4 -alkenyl, C.sub.1 -C.sub.4 -haloalkyl or C.sub.2 -C.sub.4 -haloalkenyl, and alkoxy-substituted maleic anhydrides of the formula II ##STR2## where R.sup.2 is C.sub.1 -C.sub.4 -alkyl, C.sub.2 -C.sub.4 -alkenyl, C.sub.1 -C.sub.4 -haloalkyl or C.sub.2 -C.sub.4 -haloalkenyl and Z is hydrogen, halogen or a radical OR.sup.3, where R.sup.3 is C.sub.1 -C.sub.4 -alkyl, C.sub.2 -C.sub.4 -alkenyl, C.sub.1 -C.sub.4 -haloalkyl or C.sub.2 -C.sub.4 -haloalkenyl.The invention further relates to processes for preparing such maleimides I and the corresponding maleic anhydrides II and their use as graft monomers in graft polymers based on polyphenylene ethers.
    • 本发明涉及式Ⅰ的新的烷氧基取代的马来酰亚胺,其中R 1是氢,C 1 -C 8 - 烷基,C 2 -C 8 - 烯基,苯基或苯基烷基,有机基团还可带有惰性取代基,R2和R3 C 1 -C 4 - 烷基,C 2 -C 4 - 烯基,C 1 -C 4 - 卤代烷基或C 2 -C 4 - 卤代烯基,以及式II其中R 2是C 1 -C 4 - 烷基的C 2 -C 4烷氧基取代的马来酸酐 C 4 - 烯基,C 1 -C 4 - 卤代烷基或C 2 -C 4 - 卤代烯基,Z是氢,卤素或基团OR 3,其中R 3是C 1 -C 4烷基,C 2 -C 4 - 链烯基,C 1 -C 4卤代烷基或C 2 -C 4 - C4-卤代链烯基。 本发明还涉及制备这种马来酰亚胺I和相应的马来酸酐II的方法及其作为基于聚苯醚的接枝聚合物中的接枝单体的用途。