A Novel α-Arylation of Ketones, Aldehydes, and Esters via a Photoinduced S<sub>N</sub>1 Reaction through 4-Aminophenyl Cations
作者:Andrea Fraboni、Maurizio Fagnoni、Angelo Albini
DOI:10.1021/jo034375p
日期:2003.6.1
4-chloroaniline and its N,N-dimethyl derivative by photolysis in MeCN) added to enamines and gave the corresponding alpha-(4-aminophenyl) ketones in satisfactory yields. The yields of the same ketones were increased when silyl enol ethers were used in the place of enamines. The alpha-arylation of silyl enol ethers of aldehydes occurred with lower yields and only with the N,N-dimethyl derivative. The
Palladium-Catalyzed Regiocontrolled α-Arylation of Trimethylsilyl Enol Ethers with Aryl Halides
作者:Tetsuo Iwama、Viresh H. Rawal
DOI:10.1021/ol062093g
日期:2006.12.1
Inter- and intramolecular arylations of trimethylsilylenolethers with aryl halides are accomplished regiospecifically in the presence of a palladium catalyst and tributyltin fluoride in refluxing benzene or toluene. The optimal catalyst system called for the use of Pd2(dba)3 and tri-tert-butylphosphine in ca. 1:2 ratio. Aryl iodides, bromides, and chlorides are all effective arylation partners in