Hydrogen-Bond-Directed Formal [5 + 1] Annulations of Oxindoles with Ester-Linked Bisenones: Facile Access to Chiral Spirooxindole δ‑Lactones
收藏NIAID Data Ecosystem2026-03-08 收录
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资源简介：
A novel bifunctional thiourea catalyzed formal [5 + 1] cycloaddition of oxindoles and ester-linked bisenones was successfully developed. This strategy involves two sequential Michael additions, leading to spirooxindole δ-lactones with three contiguous stereocenters including an all-carbon quaternary center with high diastereo- and enantioselectivites. In addition, a remarkable N-substituent effect was observed on the reactivity and selectivity.
创建时间：
2016-02-17
