hydroindoline-5-one-based 6/5/3-fused polycyclic ring structures through multistepcascade reactions involving α-arylvinylsulfoniums and para-quinamines. The reactions proceed smoothly under mild conditions to deliver the desired products in generally good isolated yields. This protocol is also applicable to the cascade cycloaddition reactions of α-arylvinylsulfoniums and para-quinols, effectively generating
Stereoselective Synthesis of Dioxolanes and Oxazolidines via a Desymmetrization Acetalization/Michael Cascade
作者:Tomislav Rovis、David Rubush
DOI:10.1055/s-0033-1340669
日期:——
The desymmetrization of p-quinols using a Bronsted acid catalyzed acetalization/Michael cascade was achieved in high yields and diastereoselectivities for aldehydes and imines. Use of a chiral Bronsted acid allowed for the synthesis of 1,3-dioxolane and 1,3-oxazolidine products in modest enantioselectivity.