Phosphine-catalyzed (3+2)/(2+3) sequential annulation involving a triple nucleophilic addition reaction of γ-vinyl allenoates
作者:Jiaxu Feng、You Huang
DOI:10.1039/c9cc07346a
日期:——
A phosphine-catalyzed (3+2)/(2+3) sequential annulation involving a triple nucleophilic addition reaction of γ-vinyl allenoates was successfully developed. The reaction provided efficient and more practical access to functionalized hydropyrroloimidazolones with good to excellent yields under mild reaction conditions. Notably, γ-vinyl allenoate served as a triple-electrophilic intermediate in this protocol
bi(oxazoline) ligand with palladium (II) species catalyzedasymmetric allylic alkylation reaction to access highly valuable 3-allyl-3-amino-2-oxindoles with vicinal quaternary and tertiary stereocenters in very good yields (up to 91%) and excellent enantioselectivity (up to 98% ee) with moderate to good diastereoselectivity (up to 5:1). The synthetic utility of 3-allyl-3-amino-2-oxindole was further