A Novel Highly Selective Chiral Auxiliary for the Asymmetric Synthesis of <scp>l</scp>- and <scp>d</scp>-α-Amino Acid Derivatives via a Multicomponent Ugi Reaction
作者:Andrea Basso、Luca Banfi、Renata Riva、Giuseppe Guanti
DOI:10.1021/jo048389m
日期:2005.1.1
the synthesis of a bicyclic β-amino acid scaffold in both pure enantiomeric forms and its application as chiral auxiliary in an intramolecular version of the Ugi multicomponent reaction (U-5C-4CR) to prepare α-amino acid derivatives of both d- and l-series in a straightforward and very stereoselective manner. The mild conditions required for the Ugi condensation and for the removal of the chiral auxiliary
本文描述了纯对映体形式的双环β-氨基酸支架的合成及其在Ugi多组分反应(U-5C-4CR)的分子内形式中的手性助剂的制备,以制备两种d的α-氨基酸衍生物-和l系列以直接且非常立体选择性的方式。Ugi缩合和除去手性助剂所需的温和条件使该方法对于制备各种不同结构的N-烷基化和未烷基化的氨基酸衍生物非常有吸引力。