Transition-Metal-Free α-Arylation of β-Keto Amides via an Interrupted Insertion Reaction of Arynes
                                
                                    
                                        作者:Kishor Mohanan、Yoann Coquerel、Jean Rodriguez                                    
                                    
                                        DOI:10.1021/ol302180v
                                    
                                    
                                        日期:2012.9.7
                                    
                                    Direct alpha-arylation reactions of secondary beta-keto amides with arynes, generated by fluoride-induced elimination of ortho-silyl aryltriflates, are described. The transformation proceeds via an interrupted insertion reaction of arynes and leads to densely functionalized aromatic compounds exhibiting a chiral 'all carbon' quaternary center under transition-metal-free conditions. An organocatalytic asymmetric version of the reaction also proved possible, affording the proof of concept that arynes can be involved in enantioselective transformations.