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首页> 外文期刊>Journal of Medicinal Chemistry >Doubly homologated dihalovinyl and acetylene analogues of adenosine: synthesis, interaction with S-adenosyl-L-homocysteine hydrolase, and antiviral and cytostatic effects.
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Doubly homologated dihalovinyl and acetylene analogues of adenosine: synthesis, interaction with S-adenosyl-L-homocysteine hydrolase, and antiviral and cytostatic effects.

机译：双重同源的腺苷二卤代戊基和乙炔类似物：合成，与S-腺苷-L-高半胱氨酸水解酶的相互作用以及抗病毒和细胞抑制作用。

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Treatment of the 6-aldehyde derived by Moffatt oxidation of 3-O-benzoyl-1,2-O-isopropylidene-alpha-D-ribo-hexofuranose (2c) with the dibromo- or bromofluoromethylene Wittig reagents generated in situ with tetrabromomethane or tribromofluoromethane, triphenylphosphine, and zinc gave the dihalomethyleneheptofuranose analogues 3b and 3d, respectively. Acetolysis, coupling with adenine, and deprotection gave 9-(7,7-dibromo-5,6, 7-trideoxy-beta-D-ribo-hept-6-enofuranosyl)adenine (5a) or its bromofluoro analogue 5b. Treatment of 5a with excess butyllithium provided the acetylenic derivative 9-(5,6, 7-trideoxy-beta-D-ribo-hept-6-ynofuranosyl)adenine (6). The doubly homologated vinyl halides 5a and 5b and acetylenic 6 adenine nucleosides were designed as putative substrates of the "hydrolytic activity" of S-adenosyl-L-homocysteine (AdoHcy) hydrolase. Incubation of AdoHcy hydrolase with 5a, 5b, and 6 resulted in time- and concentration-dependent inactivation of the enzyme (K(i): 8.5 +/- 0.5, 17 +/- 2, and 8.6 +/- 0.5 microM, respectively), as well as partial reduction of enzyme-bound NAD(+) to E-NADH. However, no products of the "hydrolytic activity" were observed indicating these compounds are type I mechanism-based inhibitors. The compounds displayed minimal antiviral and cytostatic activity, except for 6, against vaccinia virus and vesicular stomatitis virus (IC(50): 15 and 7 microM, respectively). These viruses typically fall within the activity spectrum of AdoHcy hydrolase inhibitors.
机译：用四溴甲烷或三溴氟甲烷原位生成的二溴或溴氟亚甲基Wittig试剂处理3-O-苯甲酰基-1,2-O-异亚丙基-α-D-核糖-呋喃糖（2c）的Moffatt氧化处理的6-醛，三苯基膦和锌分别给出了二卤代亚甲基庚呋喃糖类似物3b和3d。乙酰解，与腺嘌呤偶联和脱保护得到9-（7,7-二溴-5,6,7-三苯氧基-β-D-核糖-庚-6-呋喃呋喃糖基）腺嘌呤（5a）或其溴氟类似物5b。用过量的丁基锂处理5a，得到炔属衍生物9-（5,6,7-三甲氧基-β-D-核糖庚烷-6-呋喃呋喃糖基）腺嘌呤（6）。将双重同源的乙烯基卤化物5a和5b以及炔属6腺嘌呤核苷设计为S-腺苷-L-高半胱氨酸（AdoHcy）水解酶的“水解活性”的假定底物。将AdoHcy水解酶与5a，5b和6一起孵育会导致该酶的时间和浓度依赖性失活（K（i）：分别为8.5 +/- 0.5、17 +/- 2和8.6 +/- 0.5 microM ），以及将酶结合的NAD（+）部分还原为E-NADH。但是，没有观察到“水解活性”的产物，表明这些化合物是基于I型机理的抑制剂。除了对牛痘病毒和水疱性口炎病毒的杀伤力分别为6（IC（50）：15和7 microM）外，这些化合物均显示出最小的抗病毒和细胞抑制活性。这些病毒通常属于AdoHcy水解酶抑制剂的活性谱。

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