The dianions derived from γ-allyloxy-β-enaminoesters undergo a [2,3]-Wittig sigmatropic rearrangement leading to γ-hydroxy-β-enaminoester derivatives, which can be subsequently lactonized to the corresponding 4-aminofuran-2(5H)-ones.
δ-烯丙氧基-δ-烯
氨基酯衍生出的二元离子经过[2,3]-维蒂希西格玛式重排,生成δ-羟基-δ-烯
氨基酯衍
生物,这些衍
生物随后可内酯化为相应的 4-
氨基
呋喃-2(5H)-酮。