Photochemical synthesis of cyclic peptide models from phthalimido acetamides and phthaloyl dipeptide esters
作者:Katrin Krüger、Virginia Lüdke、Jonathan Pettinger、Luke Ashton、Laetitia Bonnet、Cherie A. Motti、Johann Lex、Michael Oelgemöller
DOI:10.1016/j.tetlet.2018.02.074
日期:2018.4
of several phthalimido acetamides and phthaloyl dipeptide esters has been investigated. Their photocyclization ability strongly depended on the substitution pattern of the amide linker group. While secondary amide-derived starting materials were largely unreactive, the corresponding tertiary amide-linked derivatives furnished the desired cyclic peptide model compounds in acceptable to good yields (41–80%)
已经研究了几种邻苯二甲酰亚胺基乙酰胺和邻苯二甲酰基二肽酯的光化学反应。它们的光环化能力在很大程度上取决于酰胺连接基团的取代方式。虽然衍生自仲酰胺的起始原料基本上没有反应性,但相应的叔酰胺连接的衍生物以可接受的产率(41-80%)提供了所需的环肽模型化合物。与结构相关的酯连接的模型衍生物在辐照下也保持不反应性。从优选夺氢ë -顺式-取代建议将解释在环化能力观察到的差异。