title: Intermolecular hydroamination of ethylene and 1-alkenes with cyclic ureas catalyzed by achiral and chiral gold(I) complexes.
abstract: Reaction of 1-methyl-imidazolidin-2-one (1) with 1-octene (10 equiv) catalyzed by a 1:1 mixture of (2b)AuCl [2b = 2-di-tert-butylphosphino-1,1'-binaphthyl] and AgSbF(6) in dioxane at 100 degrees C for 24 h led to isolation of 1-methyl-3-(octan-2-yl)imidazolidin-2-one in 96% yield as a single regioisomer. A range of unactivated 1-alkenes and ethylene underwent gold(I)-catalyzed intermolecular hydroamination at or below 100 degrees C in excellent yield with high regioselectivity. Reaction of 1-alkenes with substituted imidazolidin-2-ones catalyzed by chiral bis(gold) phosphine complexes led to enantioselective intermolecular hydroamination with up to 78% ee.
authors.affiliation: French Family Science Center, Duke University, Durham, North Carolina 27708-0346, USA.
authors.forename: Zhibin
authors.initials: Z
authors.lastname: Zhang
authors.forename: Seong Du
authors.initials: SD
authors.lastname: Lee
authors.forename: Ross A
authors.initials: RA
authors.lastname: Widenhoefer