Colchicine models: Synthesis and Antitubulin Activity of 2?-Monosubstituted and 2?, 5-Disubstituted 2,3,4,4?-Tetramethoxy-1,1?-biphenyls. Synthesis of 4,4?, 5?, 6?-tetramethoxy-1,1?-biphenyl-2,3?-dicarboxylic acid
作者:Yoshikuni Itoh、Arnold Brossi、Ernest Hamel、Judith L. Flippen-Anderson、Clifford George
DOI:10.1002/hlca.19890720203
日期:1989.3.15
conventional manipulation of alcohol and ester functions (Scheme 2). Both amines 5 and 14 as well as the 2′, 5-dimethyl-substituted biphenyl 26 prepared from the dialdehyde 25 by a Wolff-Kishner reduction, did not show noteworthy activity in the tubulin binding assay or as inhibitors of tubulin polymerization (Table). However, the 2′ethyl-substituted biphebyl 11 prepared from 4 by reaction with MeLi
用MeNH 2还原2,3,4,4'-四甲氧基联苯-2-甲醛(4)得到甲胺5(方案1),胺8的羟甲基化,类似地由4通过用苄胺还原胺化然后进行N-甲基化制备,得到醇12,其通过常规化学反应(方案2)转化为5-甲基取代的甲胺14(方案2),在羟甲基化为醇17之后,由酯16也得到甲胺14。和常规的醇和酯官能团的操作(方案2)。由二醛25通过Wolff - Kishner还原反应制得的胺5和14以及2',5-二甲基取代的联苯26在微管蛋白结合测定中或作为微管蛋白聚合的抑制剂均未显示出显着活性(表) 。但是,由4通过与MeLi反应制得的2'乙基取代的联苯二酚11,然后进行苯乙烯10的脱水和催化还原反应(方案1)在这两种测定中均显示出明显的活性,与已知的苯托酚酮模型相近。对14 ·HCl和11的X射线分析表明,环彼此之间的取向存在显着差异(图)。