Electrolytic Reactions of Fluoroorganic Compounds. 14. Regioselective Anodic Methoxylation of N-(Fluoroethyl)amines. Preparation of Highly Useful Fluoroalkylated Building Blocks
摘要:
Anodic methoxylation of various types of N-(fluoroethyl)amines, ArRNCH(2)R(f) (R(f) = CF3, CHF2, CH2F, etc.) has been systematically studied and it was found that a methoxy group was exclusively or preferentially introduced into the position a to the fluoromethyl (R(f)) group, depending on the R(f) and R groups. The effect of the R(f) group on the promotion of the anodic alpha-methoxylation decreased in the order CF3, CHF2, and CH2F. This remarkable promotion effect and unique regioselectivity can be explained mainly in terms of the alpha-CH kinetic acidities of the cation radicals formed by one-electron oxidation of the amines. The alpha-methoxylated products are highly useful precursors for the construction of carbon-carbon bonds alpha to the trifluoromethyl and difluoromethyl groups, which is difficult by other methods.
Cationic Polar Cycloaddition with Anodically Prepared a-Tri- and a-Difluoromethylated N,O-Acetals: Preparation of Fluoromethylated Tetra- and Dihydroquinoline Derivatives
作者:Toshio Fuchigami、Shinji Ichikawa、Zaghloul e. Kandeel、Akinori Konno、Tsutomu Nonaka
DOI:10.3987/com-89-5295
日期:——
Electrolytic transformation of fluoroorganic compounds. 3. Highly regioselective anodic methoxylation of N-(2,2,2-trifluoroethyl)amines
作者:Toshio Fuchigami、Yuuki Nakagawa、Tsutomu Nonaka
DOI:10.1021/jo00233a043
日期:1987.11
FUCHIGAMI, TOSHIO;ICHIKAWA, SHINJI;KANDEEL, ZAGHLOUL E.;KONNO, AKINORI;NO+, HETEROCYCLES, 31,(1990) N, C. 415-417