Tetrahedron Letters p. 5749 - 5752 (1995)
Update date:2022-08-03
Topics:
Yamazaki, Takahisa
Saito, Shin-ichi
Ohwada, Tomohiko
Shudo, Koichi
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.
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