Cyano-polycarboxylates
    5.
    发明授权
    Cyano-polycarboxylates 失效
    氰基 - 多羧酸盐

    公开(公告)号:US4514340A

    公开(公告)日:1985-04-30

    申请号:US531104

    申请日:1983-09-12

    CPC分类号: C07C57/34 C07C51/56

    摘要: 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.

    摘要翻译: 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。

    Process for the resolution of racemic alpha-aminonitriles
    10.
    发明授权
    Process for the resolution of racemic alpha-aminonitriles 失效
    拆分外消旋α-氨基腈的方法

    公开(公告)号:US4187244A

    公开(公告)日:1980-02-05

    申请号:US891973

    申请日:1978-03-30

    CPC分类号: C07C255/00

    摘要: Process for the resolution of certain racemic .alpha.-aminonitriles into optically active enantiomers which includes treating the racemic .alpha.-aminonitriles with (-)-mandelic acid in an alkanol/C.sub.5-8 hydrocarbon mixture to obtain a racemic mixture of diastereoisomeric D and L salts of (-)-mandelic acid, macerating the salts with an alkanol/C.sub.5-8 hydrocarbon mixture; neutralizing the L-form; extracting the neutralized product; and converting it into a stable form.

    摘要翻译: 将某些外消旋α-氨基腈分解成光学活性对映异构体的方法,其包括在烷醇/ C 5-8烃混合物中用( - ) - 扁桃酸处理外消旋的α-氨基腈,得到非对映异构体D和L盐的外消旋混合物 ( - ) - 扁桃酸,用烷醇/ C5-8烃混合物浸渍盐; 中和L型; 提取中和产物; 并将其转换成稳定的形式。