Synthesis of pseudoxazolones and their inhibition of the 3C cysteine proteinases from hepatitis A virus and human rhinovirus-14
作者:Yeeman K. Ramtohul、Nathaniel I. Martin、Lara Silkin、Michael N. G. James、John C. Vederas
DOI:10.1039/b202643k
日期:2002.5.23
diphenyl pseudoxazolones were prepared by cyclisation–elimination of N-α-chloroacyl amino acids or by condensation of p-substituted benzamides with glyoxylic acid followed by dehydrative cyclisation. Such pseudoxazolones are good time-dependent inhibitors of the HAV and HRV 3C proteinases with IC50 values in the micromolar range. Mechanistic insights into the mode of inhibition of the pseudoxazolones were
甲型肝炎病毒(HAV)和人鼻病毒(HRV)是属于小核糖核酸病毒家族的重要病原体。所有小核糖核酸病毒均具有3C蛋白酶,可处理最初由生物合成的前体蛋白质对于病毒的成熟和复制至关重要。通过环化-消除N -α-氯酰基氨基酸或通过对位取代的缩合反应制得单苯基和二苯基假恶唑酮苯甲酰胺 和 乙醛酸 其次是脱水 环化。此类假唑啉酮具有良好的时间依赖性抑制剂的HAV和HRV 3C蛋白酶的IC 50值在微摩尔范围内。从机制获得了对假恶唑酮抑制模式的见解。质谱 和 gHMQC 核磁共振波谱在HAV 3C酶-抑制剂复合物的使用在α碳标记有pseudoxazolone 13 C,13B(α- 13 Ç)。结果表明,HAV 3C蛋白酶通过硫醚酶的亲核攻击通过硫醚键的形成而失活。亚胺所述pseudoxazolone的位置13B(α- 13 Ç)。