Organocopper-mediated alkylation of β-(
N-Boc-2-oxo-1,3-oxazolidin-5-yl)-α,β-enoates has been intensively investigated. Alkylation proceeded regio- and stereoselectively by
anti-
SN2′ ring-opening to provide a new route to the synthesis of
ψ[(
E)-CHCH]-,
ψ[(
E)-CMeCH]- and
ψ[(
E)-CMeCMe]- type alkene dipeptide isosteres from chiral amino acid derivatives. These resulting agents are potential mimetics of type II and type II′
β-turn substructure.
有机铜介导的β-(N-Boc-2-氧代-1,3-嗯唑烷-5-基)-α,β-烯酸酯的烷基化反应已被深入研究。通过反式-SN2'环开裂,烷基化反应在区域选择性和立体选择性上进行,为从手性
氨基酸衍
生物合成ψ[(E)-CHCH]-、ψ[(E)-CMeCH]-和ψ[(E)-CMeCMe]-型烯丙二肽类似物提供了一条新途径。这些合成的试剂是潜在的II型和II'型β-转角结构域模拟物。