Novel annulation reactions of aryl methyl ketenes with zwitterions derived from dimethyl acetylenedicarboxylate and N-alkylimidazoles.
[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.
Ma
Cheng
C
Department of Chemistry, Zhejiang University, Hangzhou, China. mcorg@zju.edu.cn
Ding
Hanfeng
H
Wang
Yanguang
Y