New thermal source of dimethoxycarbene leading to zwitterionic intermediates and 2:1 stoichiometry in reaction with electrophilic alkenes.
[reaction: see text] At 50 degrees C, dimethyl dicyanofumarate and maleate react with 2 equiv of dimethoxycarbene to generate the products shown.
Zhou
Hongwei
H
Department of Chemistry, McMaster University, Hamilton, Ontario, Canada.
Mloston
Grzegorz
G
Warkentin
John
J