dimethylphenylsilylmethylmagnesium chloride result in highly regioselective dehydrohalogenation. The reaction does not follow the conventional E2 elimination mechanism but includes beta-hydride elimination from the corresponding alkylcobalt intermediate. The interesting reaction mechanism of the cobalt-catalyzed dehydrohalogenation offered unique transformations that are otherwise difficult to attain.
OLEFINATION OF KETONES USING 1,1-DIMETALLOALKANES DERIVED FROM<i>i</i>-Bu<sub>2</sub>AlCH=CHR - Cl<sub>2</sub>TiCp<sub>2</sub>SYSTEM
作者:Tadao Yoshida
DOI:10.1246/cl.1982.429
日期:1982.4.5
The alkylidenation of ketone carbonyls using 1,1-dimetalloalkanes prepared by the reaction of 1-alkenyldiisobutylalanes with titanocene dichloride afforded the corresponding olefins in good yields.