Sc(OTf)3-catalyzed cyclization of α-allylated 1,3-dicarbonyls: an efficient access to 2,2-disubstituted 2,3-dihydrofuran derivativest

A method to prepare functionalized 2,3-dihydrofurans by Sc(OTf)(3)catalyzed cyclization of alpha-allylated 1,3-dicarbonyl compounds is reported. The reactions were shown to be operationally simplistic and proceed efficiently for a variety of substrates, leading to the formation of 2,2-disubstituted 2,3-dihydrofurans in good to excellent yields.