A C(aryl)N(amine) bond atropisomeric aminophosphine: preparation and use as a ligand in a catalytic asymmetric allylic alkylation
摘要:
The existence of 3 as a pair of stable atropisomers has been demonstrated analytically through chiral phase LC-CD investigations. Resolution of 3d was achieved by preparative chiral HPLC. Finally, the ability of the first C(aryl)-N(amine) axially chiral phosphine ligand 3d is demonstrated in a catalytic asymmetric reaction. (C) 2003 Elsevier Ltd. All rights reserved.
substitution (SNAr) reaction followed by silane reduction. Aminophosphine 1d was also prepared from 2,3-difluorobenzaldehyde (4) via dimethylhydrazone. Optical resolution of C(aryl)−N(amine) bond atropisomers was achieved using (S)-(+)-di-μ-chlorobis[2-[(dimethylamino)ethyl]phenyl-C2,N]dipalladium(II) ((S)-10). The determination of absoluteconfiguration and the investigation of the rotation barrier
The existence of 3 as a pair of stable atropisomers has been demonstrated analytically through chiral phase LC-CD investigations. Resolution of 3d was achieved by preparative chiral HPLC. Finally, the ability of the first C(aryl)-N(amine) axially chiral phosphine ligand 3d is demonstrated in a catalytic asymmetric reaction. (C) 2003 Elsevier Ltd. All rights reserved.