1,1-Disubstituted and trisubstituted alkenes were converted into the corresponding β,γ-unsaturated amines 4 via three steps: the initial formation of α,β-unsaturated diphenylsulfonium triflates 2 from alkenes and diphenyl(trifluoromethanesulfonyloxy)sulfonium trifluoromethanesulfonate (1), followed by double bond migration of 2 to β,γ-unsaturated sulfonium triflates 3 with primary or secondary amines
β-Regioselective intermolecular Heck arylation of N,N-disubstituted allylamines
作者:J Wu、J.-F Marcoux、I.W Davies、P.J Reider
DOI:10.1016/s0040-4039(00)01914-6
日期:2001.1
β-Regioselectivity has been demonstrated for the Heckarylation of N,N-disubstituted allylamines. The scope and limitations of the reaction were demonstrated by the coupling of N,N-dibenzylallylamine with a variety of substituted aryl triflates. This methodology represents a straightforward approach for the efficient preparation of a variety of primary β-aryl allyl amines.
The direct electrophilic, nucleophilic, and amphiphilic allylations of allylic alcohol by use of a palladium catalyst and organometallic reagents such as organoborane and organozinc has been developed. The phosphine–borane compound works as the effective ligand for palladium-catalyzed direct allylic amination of allylic alcohol. Thus, with secondary amines, the reaction was completed in only 1 h, even