4'-Modified analogs of aristeromycin and neplanocin A: synthesis and inhibitory activity toward S-adenosyl-L-homocysteine hydrolase
作者:Michael S. Wolfe、Younha Lee、William J. Bartlett、David R. Borcherding、Ronald T. Borchardt
DOI:10.1021/jm00088a013
日期:1992.5
The carbocyclic adenosine analogues aristeromycin and neplanocin A both display significant S-adenosyl-L-homocysteine (AdoHcy) hydrolase inhibitory activity and broad-spectrum antiviral effects. Since phosphorylation of the 4'-hydroxymethyl substituent has been implicated with the cytotoxicity of these compounds, various analogues modified at this position were synthesized utilizing a key cyclopentenone
碳环腺苷类似物aristeromycin和neplanocin A均显示出显着的S-腺苷-L-高半胱氨酸(AdoHcy)水解酶抑制活性和广谱抗病毒作用。由于4′-羟甲基取代基的磷酸化与这些化合物的细胞毒性有关,因此利用关键的环戊烯酮中间体3合成了在该位置修饰的各种类似物,所述中间体可以衍生自天然手性库的几个成员。对环戊烯酮3与有机铜酸盐试剂进行高度立体选择性的缀合物加成,然后将如此形成的1,4-加合物轻松修饰为相应的4'-修饰的阿霉素。或者,用甲亚磺酰氯淬灭有机铜酸酯共轭物加成物的烯醇盐中间体,然后热解syn消除,形成4′-修饰的奈普兰霉素A中间体。最终化合物中的三个(1b,1c和1e)在纳摩尔范围内显示出对AdoHcy水解酶的抑制活性。