Stereoselective Synthesis of Sugar-Modified Enyne Analogues of Adenosine and Uridine. Interaction with <i>S-</i>Adenosyl-<scp>l</scp>-homocysteine Hydrolase and Antiviral and Cytotoxic Effects
作者:Stanislaw F. Wnuk、Elzbieta Lewandowska、Pablo R. Sacasa、Leigh N. Crain、Jinsong Zhang、Ronald T. Borchardt、Erik De Clercq
DOI:10.1021/jm040054+
日期:2004.10.1
6a, 9a, and 13 derived from adenosine require a different vicinity for binding with S-adenosyl-l-homocysteine (AdoHcy) hydrolase and/or addition of enzyme-bound water across the conjugated enyne system. Enyne 5a and 8'-iodoenyne 6a produced time-dependent and concentration-dependent inhibition of AdoHcy hydrolase (K(i), 0.55 and 118.5 microM, respectively). No reduction in NAD(+) content of the enzyme
(E)-6′-碘高碘基核苷1与(三甲基甲硅烷基)乙炔的Sonogashira偶联,得到具有预期的E-立体化学的腺苷2a和尿苷2b的共轭的8′-(三甲基甲硅烷基)烯炔衍生物。2a,b用四丁基氟化铵进行甲硅烷基化,然后用N-碘代琥珀酰亚胺/ AgNO(3)处理,得到8'-碘代炔4a,b。(Z)-6′-碘高碘基核苷7a,b的类似偶联产生了(Z)-8′-(三甲基甲硅烷基)烯炔8a,b,将其用三氟乙酸水溶液脱保护得到Z-烯炔9a,b。腺苷4'-炔基11和(Z)-3-溴丙烯酸乙酯的立体选择性偶联,然后脱保护,得到的共轭烯炔系统以相反的方向连接在C4'13上。由于它们的多样的立体化学属性,脱保护的烯炔类似物5a,6a ,9a,源自腺苷的R 2和13需要与S-腺苷-1-同型半胱氨酸(AdoHcy)水解酶结合和/或在共轭烯炔体系中添加结合酶的水不同的附近区域。Enyne 5a和8'-iodoenyne 6a