The Asymmetric Synthesis of Polycyclic Tetrahydroxanthone via the Cascade Reaction of Alkene‐Substituted 1,3‐diketones and Alkenyloxindoles
作者:Rong Zhang、Wenhui Wang、Yonghui Zhang、Yushuang Chen、Weijun Yao、Zhen Wang
DOI:10.1002/adsc.202400113
日期:2024.4.23
An enantioselective access to polycyclic tetrahydroxanthone compounds was achieved through an organocatalyzed cascade reaction of alkene‐substituted 1,3‐diketones and alkenyloxindoles, using quinine‐derivedsquaramide as an efficient catalyst. It afforded a variety of optically active spirooxindole‐based tetrahydroxanthones with 18‐94% yields, >19:1 dr, and 86‐99% ee.