- Acid-catalyzed Reactions of 1,2-Dicarbonylethanes with Benzene. Ethylene Dication Electrophiles.
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1,2-dicarbonyl compounds reacted with benzene in the presence of a strong acid, trifluoromethanesulfonic acid, to give gem-diphenylated ketones in high yields.The reaction was accelerated when the acidity of the medium was increased, supporting involvement of O,O-diprotonated 1,2-dicarbonyl species (i.e., 1,2-dihydroxyethylene dications) as the active electrophiles.
- Yamazaki, Takahisa,Saito, Shin-ichi,Ohwada, Tomohiko,Shudo, Koichi
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