Cyclopropane-Derived Peptidomimetics. Design, Synthesis, and Evaluation of Novel Enkephalin Analogues
作者:Stephen F. Martin、Michael P. Dwyer、Benoît Hartmann、Kyle S. Knight
DOI:10.1021/jo991288h
日期:2000.3.1
lactones with dipeptides, and a novel method for the synthesis of substituted diaminocyclopropanes was also developed. The Leu-enkephalin analogues were tested in a panel of binding and functional assays, and although those derivatives containing cyclopropane replacements of the Gly(2)-Gly(3) exhibited low micromolar affinity for the mu-receptor, analogues containing such replacements for the Phe(4)-Leu(5)
已知含有反式取代的环丙烷的肽模拟物可稳定寡肽的延伸构象,并且分子模型研究现在表明,相应的顺式环丙烷二肽等排体可以稳定反向。为了开始评估这种可能性,在亮氨酸脑啡肽(H(2))中引入了一系列顺式取代的环丙烷作为Gly(2)-Gly(3)和Phe(4)-Leu(5)二肽亚基的替代物N-Tyr-Gly-Gly-Phe-Leu-OH),据信以含有β-转角的构象结合阿片受体。通过具有手性铑配合物Rh(2)催化的烯丙基重氮乙酸酯对映选择性环化的序列,开发了合成含环丙烷的二肽等排体-XaaPsi [COcpCO] Yaa-和-XaaPsi [NHcpNH] Yaa-的一般方法。 [(5S)-MEPY](4)和Rh(2)[(5R)-MEPY](4)。将Weinreb酰胺化方法的有用的修饰应用于用二肽打开内酯中间体,并且还开发了合成取代的二氨基环丙烷的新方法。在结合和功能测定小组中测试了亮氨酸脑啡肽类似物,尽