A stereoselectivehypervalent iodine-promoted oxidative rearrangement of 1,1-disubstituted alkenes has been developed. This practically simple protocol provides access to enantioenriched α-arylated ketones without the use of transition metals from readily accessible alkenes.
In the presence of a catalytic amount of bis[1,3-di(p-methoxyphenyl)-1,3-propanedionato]nickel(II) (=Ni(dmp)2), various olefins are smoothly monooxygenated into corresponding epoxides in good yields with combined use of molecularoxygen and primary alcohol.