Sugar-Modified Conjugated Diene Analogues of Adenosine and Uridine: Synthesis, Interaction with <i>S-</i>Adenosyl-<scp>l</scp>-homocysteine Hydrolase, and Antiviral and Cytostatic Effects
作者:Stanislaw F. Wnuk、Bong-Oh Ro、Carlos A. Valdez、Elzbieta Lewandowska、Neida X. Valdez、Pablo R. Sacasa、Dan Yin、Jinsong Zhang、Ronald T. Borchardt、Erik De Clercq
DOI:10.1021/jm020064f
日期:2002.6.1
Moffatt oxidation of 2',3'-O-isopropylideneuridine (1a) and treatment of the crude 5'-aldehyde with formylmethylene-stabilized Wittig reagent gave the vinylogously extended 7'-aldehyde2a. Condensation of 2a with ethoxycarbonyl- or dibromomethylene phosphorane reagents gave the conjugated dienes 6a and 4a, respectively. Deacetonization gave diene ester 7a [5'(E),7'(E); with s-trans conformation] and
2′,3′-O-异丙基亚氨基尿嘧啶核苷(1a)的莫夫特氧化和用甲酰基亚甲基稳定的Wittig试剂处理粗制的5′-醛,得到乙烯基延伸的7′-醛2a。用乙氧基羰基-或二溴亚甲基膦烷试剂缩合2a,分别得到共轭二烯6a和4a。脱丙酮得到二烯酯7a [5'(E),7'(E); 具有顺反构象]和二溴二烯5a [5'(E)]。类似地,将2',3'-O-异丙基亚氨腺苷(1b)Wittig延伸至共轭二溴二烯5b [5'(E)]和二烯酸酯7b [5'(E),7'(E)]。此外,乙烯基6'(E)-锡烷基14与(E)和(Z)3-碘代丙烯酸乙酯的钯催化的偶联使立体定义的途径获得了二烯酸酯7(E,E)和16(E,Z)。将AdoHcy水解酶与100 microM的5b一起孵育会部分抑制该酶,而该酶的烟酰胺腺嘌呤二核苷(NAD(+))含量没有任何明显变化。相反,7b和16b产生时间依赖性和浓度依赖性的S-腺苷-L-高半胱