Silanediol Inhibitors of Angiotensin-Converting Enzyme. Synthesis and Evaluation of Four Diastereomers of Phe[Si]Ala Dipeptide Analogues<sup>1</sup>
作者:Jaeseung Kim、Gregory Hewitt、Patrick Carroll、Scott McN. Sieburth
DOI:10.1021/jo048121v
日期:2005.7.1
Four stereoisomers of a Phe-Ala silanediol dipeptide mimic have been evaluated as inhibitors of angiotensin-converting enzyme (ACE) and compared to ketone-based inhibitors reported by Almquist et al. One stereogenic center of the isomers was derived from the individual enantiomers of methyl 3-hydroxy-2-methylpropionate, with separation of diastereomers after introduction of the second stereogenic center
已评估了Phe-Ala硅烷二醇二肽模拟物的四种立体异构体作为血管紧张素转化酶(ACE)的抑制剂,并与Almquist等人报道的基于酮的抑制剂进行了比较。异构体的一个立体生成中心衍生自3-羟基-2-甲基丙酸甲酯的各个对映异构体,在引入第二个立体生成中心后,分离了非对映异构体。通过中间体的X射线晶体学确定非对映异构体。三种硅烷二醇非对映异构体(IC 50 = 3.8-207 nM)对ACE的抑制作用与相应的非对映异构酮(IC 50 = 1.0-46 nM)的抑制作用非常相似。第四种非对映异构体,对应于抑制性最低的酮(IC 50= 3200 nM),在硅烷二醇中表现出意想不到的抑制水平(IC 50 = 72 nM),表明与酶结合的另一种模式。