Catalytic Enantioselective [4+2] Cycloadditions of Salicylaldehyde Acetals with Enol Ethers
作者:Xiaojun Hu、Zhengbo Zhu、Zhongzheng Li、Alafate Adili、Minami Odagi、Khalil A. Abboud、Daniel Seidel
DOI:10.1002/anie.202315759
日期:2024.1.22
A readily accessible conjugate-base-stabilized carboxylic acid (CBSCA) catalyst facilitates highly enantioselective [4+2] cycloaddition reactions of salicylaldehyde-derived acetals and cyclic enol ethers, resulting in the formation of polycyclic chromanes with oxygenation in the 2- and 4-positions. Spirocyclic products are also accessible.