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
通过酰胺氮和衍生自 Cbz 保护的氨基丙基-苯丙氨酰胺的 N(α)-缩醛之间的分子内 N-酰基胺离子环化,立体选择性地合成了取代的氢吡嗪并 [1,2-a] 嘧啶-6-one 衍生物。产量。单一非对映体的形成是由于其双环结构的低能椅状构象。这种方法提供了一种方便的工具来构建内部双环肽模拟物。