Synthesis of Free andNα-Fmoc-/Nγ-Boc-Protected (2S,4S)- and (2S,4R)-4-Aminopipecolic Acids
作者:Fabrizio Machetti、Franca M. Cordero、Francesco De Sarlo、Anna M. Papini、Maria C. Alcaro、Alberto Brandi
DOI:10.1002/ejoc.200400045
日期:2004.7
bearing orthogonal Nα/Nγ-protection suitable for solid-phase peptide synthesis, is reported. These amino acids were synthesised from enantiopure ethyl (2S)-4-oxo-1-(1-phenylethyl)piperidine-2-carboxylate (1) with introduction of the side-chain amino group by reductive amination, followed by protection/deprotection of the functional groups. A mixture of Fmoc-Sly(Boc)-OH 6 and 7 was used to establish their
报道了 (2S,4S)- 和 (2S,4R)-4-氨基哌啶酸的制备,这是一种构象受限的碱性氨基酸,具有适用于固相肽合成的正交 Nα/Nγ 保护。这些氨基酸由对映体纯乙基 (2S)-4-oxo-1-(1-phenylethyl)piperidine-2-carboxylate (1) 合成,通过还原胺化引入侧链氨基,然后保护/脱保护官能团。Fmoc-Sly(Boc)-OH 6 和 7 的混合物用于建立它们在固相肽合成中的相容性。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)