Medicinal chemical studies on antiplasmin drugs. VIII. 4-Aminomethylcyclohexanecarboxylic acid derivatives having a carboxyl or carboxymethyl group at C2.
作者:SUMIRO ISODA、HITOSHI YAMAGUCHI
DOI:10.1248/cpb.28.2337
日期:——
Four isomers of 4-aminomethyl-1, 2-cyclohexanedicarboxylic acid (4) were synthesized from dimethyl 4-cyanophthalate (2) via 4-aminomethylphthalic acid (3), and the isomers of 4-aminomethyl-2-carboxymethylcyclohexanecarboxylic acid (14) were also synthesized from 5-aminophthalide (10). The configurations and preferred conformations in aqueous solution of the former isomers were determined on the basis of the nuclear magnetic resonance spectra and by converting the compounds to trimethyl 1, 2, 4-cyclohexanetricarboxylates (5), which were compared with 5 obtained from methyl bicyclo [2. 2. 2]-5-octene-2-carboxylate (8), trimethyl trimellitate (6), and trimellitic acid (9). Those of the latter isomers were deduced from the nuclear magnetic resonance spectra snd the relationships of the isomerization products of 14. The compound t-4-aminomethyl-r-1, c-2-cyclohexanedicarboxylic acid (4C), which is thought to exist in the 1-e, 2-a, 4-e form in aqueous solution, showed more potent antiplasmin activity than trans-4-aminomethyl-cyclohexanecarboxylic acid (1A).
4-aminomethyl-1, 2-cyclohexanedicarboxylic acid (4) 的四种异构体是由 4-氰基邻苯二甲酸二甲酯 (2) 通过 4-aminomethylphthalic acid (3) 合成的,4-aminomethyl-2-carboxymethylcyclohexanecarboxylic acid (14) 的异构体也是由 5-aminophthalide (10) 合成的。前一种异构体在水溶液中的构型和优选构象是根据核磁共振谱和将化合物转化为 1, 2, 4-环己烷三羧酸三甲酯(5)而确定的,并与从双环 [2. 2. 2]-5-辛烯-2-羧酸甲酯(8)、偏苯三甲酯(6)和偏苯三酸(9)中得到的 5 进行了比较。后者的异构体是从核磁共振谱和 14 的异构化产物的关系中推断出来的。化合物 t-4-aminomethyl-r-1, c-2-cyclohexanedicarboxylic acid(4C)被认为在水溶液中以 1-e、2-a、4-e 的形式存在,它比反式-4-aminomethyl-cyclohexanecarboxylic acid(1A)显示出更强的抗凝血酶活性。