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Addition of α,α-Difluoroiodomethyl Ketones to Alkenes with a Copper Catalyst

The addition reactions of α,α-difluoroiodomethyl n-butyl ketone, α,α-difluoroiodomethyl cyclohexyl ketone, or α,α-difluoroiodomethyl phenyl ketone to alkenes were successfully accomplished in good yields in the presence of copper powder. The reaction was also applicable to alkenes containing a variety of functional groups such as ester, trimethylsilyl, or ether group. Acetonitrile was determined to be the best solvent in the present study and the reaction was performed at 55 o C for 15-22 h. This reaction provides a new, efficient and