title: Novel annulation reactions of aryl methyl ketenes with zwitterions derived from dimethyl acetylenedicarboxylate and N-alkylimidazoles.
abstract: [reaction: see text] A novel three-component annulation reaction involving N-alkylimidazoles, dimethyl acetylenedicarboxylate, and in situ generated aryl methyl ketenes leading to the synthesis of 6-vinyl-1,3a-diazapentalene derivatives is reported.
authors.affiliation: Department of Chemistry, Zhejiang University, Hangzhou, China. mcorg@zju.edu.cn
authors.forename: Cheng
authors.initials: C
authors.lastname: Ma
authors.forename: Hanfeng
authors.initials: H
authors.lastname: Ding
authors.forename: Yanguang
authors.initials: Y
authors.lastname: Wang