Highly Stereoselective Brønsted Acid Catalyzed Synthesis of Spirooxindole Pyrans
作者:Jingqi Wang、Erika A. Crane、Karl A. Scheidt
DOI:10.1021/ol200987c
日期:2011.6.17
A Bronsted acid-catalyzed Prins-type cyclization sequence to construct spirooxindole pyrans in high yields and excellent diastereoselectivity has been developed. The combination of a beta-hydroxy dioxinone fragment and isatin dimethyl acetal generate oxa-spirooxindoles efficiently. These compounds are diversifiable scaffolds that tap into the rich chemistry of dioxinones.