AROMATIC KETONE SYNTHESIS WITH AMIDE REAGENTS AND RELATED REACTIONS
申请人:Klumpp Douglas A.
公开号:US20130267712A1
公开(公告)日:2013-10-10
A method of preparing an aryl carbonyl or aryl thiocarbonyl compound, comprises reacting an N-(nitroaryl)-amide or N-(nitroaryl)-thioamide with an aromatic ring, with a superacid catalyst, to produce the aryl carbonyl or aryl thiocarbonyl compound. The superacid is present in an amount of at most 8 equivalents in proportion to the N-(nitroaryl)-amide or N-(nitroaryl)-thioamide. A method of preparing aryl amide or aryl thioamide, comprises reacting an N-(nitroaryl)-carbamide or N-(nitroaryl)-thiocarbamide with an aromatic ring, with a superacid catalyst, to produce the aryl amide or aryl thioamide.
Friedel–Crafts-type reactions with ureas and thioureas
作者:Erum K. Raja、Sten O. Nilsson Lill、Douglas A. Klumpp
DOI:10.1039/c2cc34062c
日期:——
Despite the relatively low reactivities of urea and thiourea functional groups towards nucleophilic attack, we have found conditions in which they are useful substrates in Friedel-Crafts reactions. The Bronsted superacid, triflic acid, promotes these reactions and a mechanism is proposed involving dicationic, superelectrophilic intermediates.