Challenge to detect 1,4-zwitterions spectroscopically in a ketene-alkene reaction.
The first example of direct spectroscopic detection of transient species, 1,4-zwitterions, generated in a ketene-alkene reaction is reported. Also, a striking result of the intervention of an unprecedented "1,4-zwitterion neutral dimer" is presented in a new mechanistic pathway; the ketene-alkene reaction gives the product cyclobutanone from the initial cycloadduct alpha-methyleneoxetane.
Machiguchi
Takahisa
T
Department of Chemistry, Faculty of Science, Saitama University, Sakura-ku, Saitama 338-8570, Japan. machiguc@chem.saitama-u.ac.jp
Okamoto
Junko
J
Morita
Yumiko
Y
Hasegawa
Toshio
T
Yamabe
Shinichi
S
Minato
Tsutomu
T