Antineoplastic Agents. 578. Synthesis of Stilstatins 1 and 2 and Their Water-Soluble Prodrugs
作者:George R. Pettit、Andrew Thornhill、Noeleen Melody、John C. Knight
DOI:10.1021/np800608c
日期:2009.3.27
phosphate prodrugs have been summarized. Both 2 and 5 were accessed via a convergent step synthesis using phosphonium bromides 6 and 21 in Wittig reactions with 2,3-bis(tert-butyldimethylsilyloxy)-4′-methoxybenzaldehyde 14. Deprotection of silyl ethers 15 and 26 with TBAF furnished 2 and 5, respectively. Phosphorylation of 2 and 5 afforded the phosphoric acid intermediates 17 and 28 for prodrug development
有效合成3,4-亚甲二氧基-4',5-二甲氧基-2',3'-二羟基-Z - sti(提斯达汀1,2),3,4,4'-三甲氧基-2',3',5 -三羟基-Z- sti(stilstatin 2、5)和各自的磷酸盐前药已被总结。既2和5分别经由会聚步骤合成使用鏻溴化物访问6和21与2,3-双(维悌希反应叔-butyldimethylsilyloxy)-4'-甲氧基苯甲醛14。用2和5提供的TBAF对甲硅烷基醚15和26脱保护, 分别。的磷酸化2和5,得到磷酸中间体17和28为前药的开发。这些磷酸前体在一系列平行反应中使用,以产生选择的金属阳离子前药候选物。针对一组一只小鼠(P388)和六种人类癌细胞系评估了Stilstatins 1(2)和2(5)及其各自的前药的生物活性。与康维他汀A-2(1)相比,斯蒂尔斯汀(1)(2)在B环上具有一个附加的邻位羟基,其存在对癌细胞系的效力有害;体内然而,由