Synthesis of 4-Substituted-3-aminopiperidin-2-ones: Application to the Synthesis of a Conformationally Constrained Tetrapeptide <i>N</i>-Acetyl-Ser-Asp-Lys-Pro
作者:Sukeerthi Kumar、Céline Flamant-Robin、Qian Wang、Angèle Chiaroni、N. André Sasaki
DOI:10.1021/jo050736k
日期:2005.7.1
A new and practical synthetic strategy is developed for the synthesis of six-membered lactam-bridged dipeptides, 4-substituted-3-aminopiperidin-2-ones, featuring two key steps: (a) a diastereoselective addition of cuprate to (E)-α,β-unsaturated ester (3) and (b) racemization-free reductive amination. On the basis of this methodology, conformationally constrained tetrapeptide N-acetyl-Ser-Asp-Lys-Pro
为合成六元内酰胺桥联的二肽4-取代-3-氨基哌啶-2-酮,开发了一种新的实用合成策略,该策略具有两个关键步骤:(a)向(E)-非对映选择性地添加铜酸盐。 α,β-不饱和酯(3)和(b)无消旋的还原胺化。基于该方法,已经成功地由3-氨基-4-乙烯基哌啶-2-酮(22)合成了构象受限的四肽N-乙酰基-Ser-Asp-Lys-Pro(AcSDKP)(2)。