Synthesis of di- and tripeptide analogues containing α-ketoamide as a new core structure for inhibition of HIV-1 protease
作者:Mahmoud M Sheha、Nadia M Mahfouz、Hoda Y Hassan、Adel F Youssef、Tsutomu Mimoto、Yoshiaki Kiso
DOI:10.1016/s0223-5234(00)00187-2
日期:2000.10
quantitative yields. The alpha-keto tripeptides (18-21) were obtained by oxidation of the hydroxyl group of Apns (PI) in the appropriate tripeptide, iQOA-Val-Apns-(un)substituted Thz(Oxa)-NHBu(t) with DMSO/DCC. Preliminary evaluation of the activity of the synthesized derivatives was determined as percentage of enzyme inhibition at 5 microM and 50 nM levels of the di- and tripeptides respectively. The alpha-ketoamides
设计和合成了含有α-酮酰胺作为新的核心结构并掺入别苯基去甲他汀(Apns)作为过渡态模拟物的二肽和三肽类似物,希望获得一种新型的HIV-1蛋白酶抑制剂。直接前体Apns-Thz-NHBu(t)是通过Boc-Apns与N-叔丁基丁基Thz-4-羧酰胺盐酸盐偶联制得的。除去Boc基团,然后与各自的α-酮酸残基(P2)偶联,以几乎定量的产率得到所需的二肽(8-12)。通过用适当的三肽iQOA-Val-Apns-(未)取代的Thz(Oxa)-NHBu(t)中的Apns(PI)氧化Apns(PI)的羟基获得α-酮基三肽(18-21) DCC。对合成衍生物活性的初步评估被确定为分别在二肽和三肽的5 microM和50 nM水平下酶抑制的百分比。相对于作为HIV-1蛋白酶抑制剂的母体同等异构体,α-酮酰胺显示出显着增强的效力,并且被证明是酶抑制剂开发的有希望的新核心结构。尝试使用LFE模型的定量方法,将