Alkenylation of arylamines and N-arylacetamides with acetylene compounds in superacids
作者:A. O. Shchukin、A. V. Vasil’ev、S. A. Aristov、G. K. Fukin、A. P. Rudenko
DOI:10.1134/s1070428008070063
日期:2008.7
Vinyl type cations generated in superacid HSO3F by the protonation of the triple bond of acetylene compounds efficiently react with arylammonium ions and N-arylacetamides yielding alkenylation products of the aromatic rings in the given amino derivatives. The regio- and stereoselectivity of electrophilic aromatic substitution was investigated involving vinyl type cations and arylammonium ions or N-arylacetamides in HSO3F.
New method of alkenylation of anilines by acetylene compounds in the superacid HSO3F
作者:Andrey O. Shchukin、Aleksander V. Vasilyev、Andrey P. Rudenko
DOI:10.1016/j.tet.2008.04.092
日期:2008.6
Vinyl cations, generated by protonation of the triple bond of α,β-alkynylcarbonyl compounds in the superacid HSO3F, react efficiently with arylammonium (anilinium) ions at low temperatures −75 and −30 °C in 30–75 min with the formation of Friedel–Crafts-type products of anilinium ring alkenylation in 14–62% yields. Regio- and stereoselectivity of such electrophilic aromatic substitution has been studied