Stereospecific Synthesis of Conformationally Constrained γ-Amino Acids: New Foldamer Building Blocks That Support Helical Secondary Structure
作者:Li Guo、Yonggui Chi、Aaron M. Almeida、Ilia A. Guzei、Brian K. Parker、Samuel H. Gellman
DOI:10.1021/ja907233q
日期:2009.11.11
A highly stereoselective synthesis of novel cyclically constrained gamma-amino acid residues is presented. The key step involves organocatalytic Michael addition of an aldehyde to 1-nitrocyclohexene. After aldehyde reduction, this approach provides optically active beta-substituted delta-nitro alcohols (96-99% ee), which can be converted to gamma-amino acid residues with a variety of substituents at