Stereoselective synthesis of a set of two functionalized (E)-alkene dipeptide isosteres of L-amino acid-L-Glu and L-amino acid-D-Glu
作者:Shinya Oishi、Hirokazu Tamamura、Masaki Yamashita、Yoshihiko Odagaki、Nobuyuki Hamanaka、Akira Otaka、Nobutaka Fujii
DOI:10.1039/b103833h
日期:——
Treatment of N-arylsulfonyl-γ,δ-cis- or -trans-γ,δ-epimino (E)-α,β-enoates with HCl–1,4-dioxane affords regio- and stereo-selective ring-opened products, δ-aminated γ-chloro-α,β-enoates. This ring-opening reaction provides a useful method for the stereoselective synthesis of a set of diastereomeric (L-Xaa, L-Glu)-type and (L-Xaa, D-Glu)-type (E)-alkene dipeptide isosteres (EADIs) from a single substrate of γ,δ-epimino (E)-α,β-enoate using organozinc–copper reagents.
N-arylsulfonyl-γ,δ-cis- or -trans-γ,δ-epimino (E)-α,β-烯酸盐用 HCl-1,4- 二氧六环处理后,可得到具有区域和立体选择性的开环产物--δ-氨基 γ-氯-α,β-烯酸盐。这种开环反应为使用有机锌铜试剂从单一底物γ,δ-表亚胺 (E)-α,β-烯酸盐立体选择性合成一组非对映异构体 (L-Xaa, L-Glu) 型和 (L-Xaa, D-Glu) 型 (E)- 烯二肽异构体 (EADIs) 提供了一种有用的方法。