multikilogram-scale synthesis of bis-amino acid precursors. This allows the synthesis of stereochemically and functionally diverse spiroligomers utilizing solid-phase Fmoc/tBu chemistry to facilitate the development of applications. Four tetramers were assembled on a semiautomated microwave peptide synthesizer. We determined their secondary structures with two-dimensional nuclearmagneticresonancespectroscopy.
我们报告了使用临时 Cu 2+络合策略以及双氨基酸前体的高效多千克规模合成功能化双氨基酸构建块的芴基甲氧基羰基 (Fmoc) 保护。这允许利用固相 Fmoc/tBu 化学合成立体化学和功能多样的螺旋低聚物,以促进应用的开发。在半自动微波肽合成仪上组装了四个四聚体。我们用二维核磁共振波谱确定了它们的二级结构。
Studies on Hydroxyproline
作者:Arthur A. Patchett、Bernhard Witkop
DOI:10.1021/ja01558a050
日期:1957.1
The Synthesis of Curved and Linear Structures from a Minimal Set of Monomers
作者:Christopher G. Levins、Christian E. Schafmeister
DOI:10.1021/jo051639u
日期:2005.10.1
Spiro-ladder oligomers of designed shape were assembled from a set of two enantiomeric bis-amino acid monomers. Two tetramers of differing monomer sequence were synthesized to study the effect of monomer stereochemistry upon macromolecular shape. Two-dimensional NMR experiments were used to determine the conformational preference of the monomers within the context of the oligomers. The results of this structural study were used to design two pentamers: one resembling a rod and another with a curved shape. The pentamers were end-labeled with naphthyl and dansyl groups. The design hypothesis was confirmed by measuring the efficiency of fluorescence resonance energy transfer between the naphthyl and dansyl fluorophore pair.
An improved, scalable synthesis of bis-amino acids
作者:Jae Eun Cheong、Conrad T. Pfeiffer、Justin D. Northrup、Matthew F.L. Parker、Christian E. Schafmeister
DOI:10.1016/j.tetlet.2016.09.032
日期:2016.11
acids are chiral, cyclic building blocks that display two alpha-amino acids that are differentiated from each other with protectinggroups. They are assembled into spiroligomers—rigid, shape-programmable spirocyclic oligomers that are both stereochemically and functionally diverse. The synthesis presented here focuses on recent improvements that allow for a convenient, large-scale synthesis of twelve