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    • 7. 发明授权
    • Process for the production of N-(hydroxyphenyl) maleimides
    • 制备N-(羟基苯基)马来酰亚胺的方法
    • US4289699A
    • 1981-09-15
    • US88825
    • 1979-10-26
    • Masayuki ObaMotoo KawamataHikotada TsuboiNobuhito Koga
    • Masayuki ObaMotoo KawamataHikotada TsuboiNobuhito Koga
    • C07D207/44C07D207/448C07D207/452
    • C07D207/448
    • N-(hydroxyphenyl) maleimides of the general formula ##STR1## where R' stands for H, CH.sub.3, C.sub.2 H.sub.5, F, Cl, Br or I and n is an integer of 1-5 are produced by treating the corresponding maleamic acid or by treating the ester of said N-(hydroxyphenyl) maleimide at a temperature of 0.degree.-150.degree. C. in the presence of at least one dehydrating agent selected for the group consisting of oxides and oxyacids of sulfur or phosphorus and alkali metal and alkaline earth metal salts of the said oxyacids. The corresponding maleamic acid can be obtained by reacting an aminophenol having one or more hydroxyl groups on its phenyl nucleus with maleic anhydride. The esters of the N-(hydroxyphenyl maleimide) can be obtained by reacting said aminophenol and said maleic anhydride in the presence of a conventional acid anhydride dehydrating agent and a conventional imide-forming cyclization catalyst.
    • 其中R'代表H,CH 3,C 2 H 5,F,Cl,Br或I并且n是1-5的整数的N-(羟基苯基)马来酰亚胺,其中R'代表H,CH 3,C 2 H 5,F,Cl,Br或I,并且n是通过处理相应的马来酰胺酸或 在选自硫或磷的氧化物和含氧基团以及碱金属和碱土金属的至少一种脱水剂存在下,在0-150℃的温度下处理所述N-(羟基苯基)马来酰亚胺的酯 所述含氧酸的金属盐。 相应的马来酰胺酸可以通过使苯基上具有一个或多个羟基的氨基苯酚与马来酸酐反应来获得。 N-(羟基苯基马来酰亚胺)的酯可以通过在常规的酸酐脱水剂和常规的形成酰亚胺的环化催化剂的存在下使所述氨基苯酚和所述马来酸酐反应来获得。
    • 8. 发明授权
    • Process for the production of N-(hydroxyphenyl) maleimides
    • 制备N-(羟基苯基)马来酰亚胺的方法
    • US4231934A
    • 1980-11-04
    • US956971
    • 1978-11-02
    • Masayuki ObaMotoo KawamataHikotada TsuboiNobuhito Koga
    • Masayuki ObaMotoo KawamataHikotada TsuboiNobuhito Koga
    • C07D207/44C07D207/448
    • C07D207/448
    • N-(hydroxyphenyl) maleimides of the general formula ##STR1## where R' stands for H, CH.sub.3, C.sub.2 H.sub.5, F, Cl, Br or I and n is an integer of 1-5 are produced by treating the corresponding maleamic acid or by treating the ester of said N-(hydroxyphenyl) maleimide at a temperature of 0-150.degree. C. in the presence of at least one dehydrating agent selected from the group consisting of oxides and oxyacids of sulfur or phosphorus and alkali metal and alkaline earth metal salts of the said oxyacids. The corresponding maleamic acid can be obtained by reacting an aminophenol having one or more hydroxyl groups on its phenyl nucleus with maleic anhydride. The esters of the N-(hydroxyphenyl maleimide) can be obtained by reacting said aminophenol and said maleic anhydride in the presence of a conventional acid anhydride dehydrating agent and a conventional imide-forming cyclization catalyst.
    • 其中R'代表H,CH 3,C 2 H 5,F,Cl,Br或I并且n是1-5的整数的N-(羟基苯基)马来酰亚胺,其中R'代表H,CH 3,C 2 H 5,F,Cl,Br或I,并且n是通过处理相应的马来酰胺酸或 在选自硫或磷的氧化物和含氧基团以及碱金属和碱土金属的至少一种脱水剂的存在下,在0-150℃的温度下处理所述N-(羟基苯基)马来酰亚胺的酯 所述含氧酸的盐。 相应的马来酰胺酸可以通过使苯基上具有一个或多个羟基的氨基苯酚与马来酸酐反应来获得。 N-(羟基苯基马来酰亚胺)的酯可以通过在常规的酸酐脱水剂和常规的形成酰亚胺的环化催化剂的存在下使所述氨基苯酚和所述马来酸酐反应来获得。