Synthesis of chiral 1,6,8-trioxoperhydropyrazino[1,2-c]-pyrimidines as novel highly functionalized scaffolds for peptidomimetics
作者:Susana Herrero、Antonio Salgado、M.Teresa Garcı́a-López、Rosario Herranz
DOI:10.1016/s0040-4039(02)00964-4
日期:2002.7
The synthesis of novel chiral 4,7-disubstituted- and 2,4,7-trisubstituted-1,6,8-trioxoperhydropyrazino[1,2-c]pyrimidines from suitably protected TrpΨ[CH(CN)NH]Asp pseudodipeptides is described. This synthesis involves the cyclization of the Ψ[CH(CN)NH] pseudodipeptides, via catalytic hydrogenation and in situ lactamization, to give 3,5-disubstituted-2-oxopiperazine derivatives, which upon reaction
描述了由适当保护的TrpΨ[CH(CN)NH] Asp假二肽合成新型手性4,7-二取代-和2,4,7-三取代-1,6,8-三氧杂氢吡嗪并[1,2- c ]嘧啶的方法。该合成涉及通过催化氢化和原位内酰胺化对Ψ[CH(CN)NH]假二肽进行环化,生成3,5-二取代-2-氧杂哌嗪衍生物,该衍生物与异氰酸酯反应后,再进行碱催化的环化导致目标4,7-二取代-1,6,8-三氧杂氢吡嗪并[1,2- c ]-嘧啶。这些双环杂环的烷基化得到它们相应的2,4,7-三取代的衍生物。