Synthesis of quinone derivatives of quinocarcin.
作者:Hiromitsu SAITO、Akira SATO、Tadashi ASHIZAWA、Makoto MORIMOTO、Tadashi HIRATA
DOI:10.1248/cpb.38.3202
日期:——
O-Demethyl-DX-52-1 (3a) was prepared from quinocarcin (1) in two steps (cyanation and O-demethylation). Upon treatment with Fremy's salt, 3a and its esters 3b, 3c afforded the desired quinone 4-6 in good yields. Various substituted quinones 12-37, 47-50 were prepared from 4-6 by Thiele acetylation followed by hydrolysis of acetates and halogenation, by direct addition of amine, alcohol and mercaptan
O-Demethyl-DX-52-1(3a)是由奎宁霉素(1)分两个步骤(氰化和O-脱甲基化)制得的。用弗雷米氏盐3a及其酯3b,3c处理后,以良好的收率得到所需的醌4-6。各种取代的醌12-37、47-50是由4-6通过Thiele乙酰化,然后将乙酸酯水解和卤化,通过直接添加胺,醇和硫醇,然后进行环氧化和随后用苯胺打开环氧化物制备的。从相应的甲氧基苯酚7b和38b获得醌单酮39b和40。添加羟胺使喹酮肟区域特异性地为44。在各种衍生物中,双甲基硫代醌(37)的抗肿瘤活性是最有前途的。