Tandem β-Alkylation−α-Arylation of Amines by Carbolithiation and Rearrangement of <i>N</i>-Carbamoyl Enamines (Vinyl Ureas)
作者:Jonathan Clayden、Morgan Donnard、Julien Lefranc、Alberto Minassi、Daniel J. Tetlow
DOI:10.1021/ja1007992
日期:2010.5.19
an umpolung fashion to the beta-carbon of N-carbamoyl enamines (N-vinyl ureas). The reaction proceeds with syn diastereospecificity and provides urea-stabilized, configurationally defined organolithiums. Facilitated by coordinating solvents (THF or DMPU), these undergo intramolecular attack on an N'-aryl group, resulting in retentive arylation of the organolithium and hence overall addition of an alkyl