title: Catalytic [2+2] and [3+2] cycloaddition reactions of allenoates with cyclic ketimines.
abstract: Cyclic ketimines as electrophiles for [2+2] and [3+2] cycloaddition reactions of allenoates have been developed, affording functionalized sultam-fused azetidines and dihydropyrroles, respectively, in good yields with high regioselectivities.
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Xiang-Yu
authors.initials: XY
authors.lastname: Chen
authors.forename: Ruo-Chen
authors.initials: RC
authors.lastname: Lin
authors.forename: Song
authors.initials: S
authors.lastname: Ye