Synthesis and conformational preferences of cyclic unnatural di- and tripeptides containing an l-valine unit: Part 2
作者:Daniele Balducci、Enrico Emer、Fabio Piccinelli、Gianni Porzi、Maurizio Recanatini、Sergio Sandri
DOI:10.1016/j.tetasy.2005.10.030
日期:2005.11
Stereoselective syntheses of non-proteinogenic di- 14a,b, 15a,b and 16a,b and tripeptides 14c, 15c and 16c containing an l-valine unit and a cyclic unnatural α-amino acid have been accomplished starting from the l-valine derived chiral synthon 1. The conformational preferences of these unnatural peptides were investigated by 1H NMR and IR spectroscopies and by molecular modelling calculations. X-ray
从衍生自L-缬氨酸的化合物已经完成了非蛋白生成的di- 14a,b,15a,b和16a,b以及包含l-缬氨酸单元和环状非天然α-氨基酸的三肽14c,15c和16c的立体选择性合成。手性合成子1。通过1 H NMR和IR光谱以及分子模型计算研究了这些非天然肽的构象偏好。还报道了伪肽15a和15b的X射线分析。