申请人:Monsanto Company
公开号:US04514340A1
公开(公告)日:1985-04-30
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.
一种苯乙基取代的
乙烯和
马来酸酐二聚体,命名为7-苯基
辛烷-(1,2),(5,6)-二酸酐,通过以下
化学合成:(a)用烷基2,4-二卤
丁酸酯烷基化烷基2-
氰基-3-苯基
丁酸酯,(b)用从三烷基
乙烷-1,1,2-
三羧酸酯和二甲基
氰基
乙烷-1,2-二
羧酸酯中选择的
羧酸酯烷基化所得的卤化物缩合产物,(c)酸
水解所得的四酯或五酯,并伴随脱羧作用,(d)脱
水所得的
四酸,得到所需的苯乙基取代的
乙烯和
马来酸酐二聚体,其中
丁酸酯和
羧酸酯中的烷基每个含有从1到大约4个碳原子,卤素从
溴、
氯和
碘中选择。