Design, Synthesis, and Optimization of Balanced Dual NK1/NK3Receptor Antagonists
摘要:
In connection with a program directed at potent and balanced dual NK1/NK3 receptor ligands, a focused exploration of an original class of peptidomimetic derivatives was performed. The rational design and molecular hybridization of a novel phenylalanine core series was achieved to maximize the in vitro affinity and antagonism at both human NK1 and NK3 receptors. This study led to the identification of a new potent dual NK1/NK3 antagonist with pK(i) values of 8.6 and 8.1, respectively.
Synthesis of a novel benzyl-octahydropyrazino[1,2-a]pyrimidin-6-one derivative as a convenient internal bicyclic peptidomimetic
作者:Byoung J. Min、Xuyuan Gu、Takashi Yamamoto、Ravil R. Petrov、Hongchang Qu、Yeon Sun Lee、Victor J. Hruby
DOI:10.1016/j.tetlet.2008.01.137
日期:2008.3
A substituted hydropyrazino[1,2-a]pyrimidin-6-one derivative was synthesized stereoselectively via the intramolecular N-acyliminium ion cyclization between an amide nitrogen and an N(alpha)-acetal derived from Cbz-protected aminopropyl-phenylalaninamide in very good yields. The formation of a single diastereomer is due to the low energy chairlike conformation of its bicyclic structure. This methodology