Difluoroalanine: Synthesis, Incorporation in Peptides, and Hydrophobic Contribution Assessment
作者:Yazid Boutahri、Khoubaib Ben Haj Salah、Nicolas Tisserand、Nathalie Lensen、Benoît Crousse、Thierry Brigaud
DOI:10.1021/acs.orglett.3c02853
日期:2023.9.22
straightforward synthesis of chiral (R)- and (S)-difluoroalanine is reported. The key step is a Strecker-type reaction followed by hydrogenolysis, Fmoc protection, and acidic hydrolysis. Peptide coupling reactions at its N- and C-terminal positions provide diastereomerically pure tripeptides. On the basis of hydrophobicity index measurements, the hydrophobic contribution of difluoroalanine in a peptide chain
报道了手性 ( R )-和 ( S )-二氟丙氨酸的直接合成。关键步骤是 Strecker 型反应,然后是氢解、Fmoc 保护和酸性水解。N 端和 C 端位置的肽偶联反应提供非对映体纯的三肽。根据疏水性指数测量,发现肽链中二氟丙氨酸的疏水贡献与侧链范德华体积较小的异亮氨酸相似。