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    • 5. 发明授权
    • Cyano-polycarboxylates
    • 氰基 - 多羧酸盐
    • US4514340A
    • 1985-04-30
    • US531104
    • 1983-09-12
    • Jacob S. TouAlfred A. Schleppnik
    • Jacob S. TouAlfred A. Schleppnik
    • C07C51/56C07C57/34C07C121/66
    • C07C57/34C07C51/56
    • A phenylethyl substituted dimer of ethylene and maleic anhydride, named 7-phenyloctane-(1,2),(5,6)-dianhydride, is chemically synthesized by(a) alkylating alkyl 2,4-dihalobutyrate with alkyl 2-cyano-3-phenylbutyrate,(b) alkylating the resulting halide condensation product with a carboxylate selected from the group consisting of trialkyl ethane-1,1,2-tricarboxylate and dimethyl cyanoethane-1,2-dicarboxylate,(c) acid hydrolyzing the resulting tetra or pentaester accompanied by decarboxylating, and(d) dehydrating the resulting tetra-acid to yield the desired phenylethyl substituted dimer of ethylene and maleic anhydride,wherein the alkyls in the butyrate and carboxylate ester groups each contain from one to about four carbon atoms and halo is selected from the group consisting of bromo, chloro and iodo.
    • 乙烯和马来酸酐的苯基乙基取代二聚体,命名为7-苯辛基 - (1,2),(5,6) - 二氢化钠,是通过(a)使2,4-二卤代烷基烷基化与2-氰基-3- - 苯基丁酸酯,(b)将所得的卤化物缩合产物与选自三烷基乙烷-1,1,2-三羧酸三乙酯和二甲基氰基乙烷-1,2-二羧酸酯的羧酸烷基化,(c)酸水解所得四 五酸酯伴随着脱羧,和(d)使得到的四酸脱水得到乙烯和马来酸酐所需的苯基乙基取代的二聚体,其中丁酸酯和羧酸酯基团中的烷基各自含有1个至约4个碳原子,卤素是 选自溴,氯和碘。