Electrophile-induced bromocyclization of γ,δ-unsaturated ketimines to intermediate 1-pyrrolinium salts and their selective conversion into novel 5-alkoxymethyl-2-aryl-3-chloropyrroles and 2-aroylpyrroles
作者:Matthias D'hooghe、Christophe Buyck、Jan Contreras、Norbert De Kimpe
DOI:10.1039/b813890g
日期:——
N-(1-Aryl-2,2-dichloropent-4-enylidene)amines were efficiently transformed into 5-bromomethyl-1-pyrrolinium bromides via electrophile-induced bromocyclization. The latter pyrrolinium salts were converted into novel 5-alkoxymethyl-2-aryl-3-chloropyrroles by reaction with alkoxides in the corresponding alcohol or in THF. This chemistry clearly deviates from the corresponding gamma,delta-unsaturated alpha
NMR evidence of the kinetic and thermodynamic products in the NIS promoted cyclization of 1-phenyl-4-pentenylamines. Synthesis and reactivity of trans-2-phenyl-5-iodopiperidines
作者:Faïza Diaba、Josep Bonjoch
DOI:10.1039/c0cc05105e
日期:——
The intramolecular reaction of secondary amines with tethered alkenes using NIS was studied, which gave insight into the kineticvs. thermodynamiccontrol of the iodoaminocyclization and the regioselectivity of the aziridinium ring-opening reactions, and led to functionalized piperidines.