2-Acetylpyridine thiocarbonohydrazones. Potent inactivators of herpes simplex virus ribonucleotide reductase
摘要:
A series of 2-acetylpyridine thiocarbonohydrazones was synthesized for evaluation as potential antiherpetic agents. The compounds were prepared by the condensation of 2-acetylpyridine with thiocarbonohydrazide followed by treatment with isocyanates or isothiocyanates. Many were found that were potent inactivators of ribonucleotide reductase encoded by HSV-1 and weaker inactivators of human enzyme. Several thiocarbonohydrazones (e.g. 38 and 39) inactivated HSV-1 ribonucleotide reductase at rate constants as much as seven times that of lead compound 2. In general, those substituted with weak electron-attracting groups offered the best combination of potency and apparent selective activity against the HSV-1 enzyme. Seven new thiocarbonohydrazones (21, 25, 31, 36, 38, 39, and 40) were apparently greater than 50-fold more selective than 2 against HSV-1 ribonucleotide reductase versus human enzyme. The results indicated new compounds worthy of further study as potentiators of acyclovir in combination topical treatment of herpes virus infections.
The compounds bis(methyl 2-pyridyl ketone) carbono-(H2L1) and thiocarbono-hydrazone (H2L2) have been synthesized, their protonation constants obtained through spectrophotometric studies and their crystal structures determined by X-ray diffractometry. Their complexation behaviour has been studied towards copper and zinc chloride and acetate. The results indicate that they are able to form bimetallic
合成了双(甲基2-吡啶基酮)碳-(H 2 L 1)和硫代碳-(H 2 L 2),通过分光光度法研究获得了质子化常数,并通过X射线衍射法确定了其晶体结构。已经研究了它们对铜,氯化锌和乙酸盐的络合行为。结果表明,它们能够与所用的铜盐和乙酸锌形成双金属络合物。这是通过对[Cu 2(HL 1)Cl 3(OH 2)]·1.5H 2 O进行的X射线分析证实的。