18867-43-1Relevant articles and documents
Diamine-Tethered Bis(thiourea) Organocatalyst for Asymmetric Henry Reaction
Otevrel, Jan,Bobal, Pavel
, p. 8342 - 8358 (2017/08/23)
We have developed a novel multifunctional C2-symmetric biphenyl-based diamine-tethered bis(thiourea) organocatalyst, which was tested in the asymmetric Henry reaction. Under thoroughly optimized conditions, the catalyst provided exceptionally high yields and excellent enantioselectivities especially for electron-deficient aromatic and heterocyclic substrates. Due to a high affinity of the catalyst to silica gel, a simple chromatography-free nitroaldol isolation procedure was feasible. Preliminary kinetic and spectroscopic experiments were performed in order to complete the mechanistic picture of the organocatalyzed nitroaldolization process. Finally, the developed synthetic strategy was successfully applied to the catalytic enantioselective syntheses of enantiopure (S)-econazole and (R)-mirabegron a late-stage intermediate.
Asymmetric Hydrogenation of α, β, and γ-Aminoketones Catalyzed by Cationic Rhodium(I){AMPP} Complexes
Devocelle, Marc,Agbossou, Francine,Mortreux, André
, p. 1306 - 1308 (2007/10/03)
The chiral cationic rhodium aminophosphine-phosphinite complexes 4-6 were applied successfully in the asymmetric hydrogenation of α- (7-9), β- (10, 11) and γ- (12) aminoketone hydrochloride derivatives leading to the corresponding aminoalcohols in up to 9
A new type of atropisomeric biphenylbisphosphine ligand, (R)-MOC-BIMPO and its use in efficient assymetric hydrogenation of α-aminoketone and itaconic acid
Yoshikawa,Yamamoto,Murata,Awano,Morimoto,Achiwa
, p. 13 - 16 (2007/10/02)
A new atropisomeric biphenylbisphosphine, MOC-BIMOP, has been prepared in enantiomerically pure form and its rhodium(I) complex proved to be an efficient catalyst in the asymmetric hydrogenations of α-aminoketone hydrochloride and itaconic acid. A possibl