New 4H-chromen-4-one and 2H-chromene derivatives as anti-picornavirus capsid-binders
摘要:
Substituted (E)-3-styryl-4H-chromen-4-ones 1a-d, 3-[(1E,3E)-4-phenylbuta-1,3-dienyl]-4H-chromen-4-ones 2a-d, (E)-3-styryl-2H-chromenes 3a-d and 3-[(1E, 3E)-4-phenylbuta-1,3-dienyl]-2H-chromenes 4a-d were designed and synthesized to improve the anti-picornavirus activity of previously tested analogues. The new compounds were evaluated in vitro against human rhinovirus (HRV) serotypes 1B and 14 and enterovirus (EV) 71. All the compounds interfered with the replication of picornaviruses, although considerable differences were observed in the sensitivity of viruses to each compound. Generally, both HRVs were more susceptible than EV71 and their sensitivity was dependent upon the linker chain length as well as upon the oxidation state of the heterocyclic ring. (E)-3-Styryl-2H-chromene (3a) emerged as the most effective inhibitor of both HRVs showing IC50 values of 0.20 mu M and 1.38 mu M towards serotype 1B and 14, respectively. The potent activity was also coupled with low cytotoxicity resulting in high therapeutic indexes (250 and 36, respectively). Mechanism of action studies indicated that 3a, like structurally related compounds, behaves as a capsid binder interfering with the early stages of rhinovirus infection, probably at the adsorption and/or uncoating level. (C) 2010 Elsevier Ltd. All rights reserved.
作者:Vera L. M. Silva、Artur M. S. Silva、Diana C. G. A. Pinto、José A. S. Cavaleiro、Attila Vasas、Tamás Patonay
DOI:10.1007/s00706-008-0926-0
日期:2008.11
Several ( E )- and ( Z )-3-styrylchromones were prepared by two different methodologies, the Wittig reaction of chromone-3-carboxaldehyde with benzylic ylides and the Knoevenagel condensation of chromone-3-carboxaldehyde with phenylacetic acids in the presence of potassium tert -butoxide under microwave irradiation. The Knoevenagel reaction followed by a decarboxylation offered an efficient and diastereoselective
通过两种不同的方法制备了几种( E )-和( Z )-3-苯乙烯基色酮,在钾存在下,色酮3-甲醛与苄基的 Wittig 反应以及色酮3-甲醛与苯乙酸的 Knoevenagel 缩合。 微波辐射下的 叔 丁醇盐。的 诺文葛耳 反应,然后脱羧提供了一个有效的和非对映选择性制备方法( Ë )-3-苯乙烯基色酮在较短的反应时间内。还证明了苯基乙酸也可以成功地被苯基丙二酸取代。通过NMR实验确定所有产物的立体化学。