Asymmetric Dearomatic Diels–Alder Reactions of Diverse Heteroarenes via π-System Activation
作者:You-Cai Xiao、Cai-Zhen Yue、Peng-Qiao Chen、Ying-Chun Chen
DOI:10.1021/ol501217u
日期:2014.6.20
An asymmetric dearomatic Diels-Alder protocol for various heteroarenes, such as benzofuran, benzothiophene, or even furan, has been developed via pi-system activation. This method involves in situ generation of formal trienamine species embedding a heteroaromatic moiety, and an array of chiral fused frameworks with high molecular complexity and skeletal diversity were efficiently constructed in good to excellent stereoselectivity by the catalysis of a cinchona-based primary amine.