A new hydroxydiphosphine as a ligand for Rh(I)-catalyzed enantioselective hydrogenation
摘要:
A new diphosphine ligand bearing a hydroxy group in the backbone was synthesized starting from 9-bromocamphor. The rhodium(I) complex based on this ligand was tested in the hydrogenation of alpha- and beta-amino acid precursors. The activity and selectivity of the catalyst were found to be strongly dependent upon the nature of the substrate. Thus. beta-acetylamino carboxylates were obtained with up to 97% ee. (C) 2002 Published by Elsevier Science Ltd.
A new hydroxydiphosphine as a ligand for Rh(I)-catalyzed enantioselective hydrogenation
摘要:
A new diphosphine ligand bearing a hydroxy group in the backbone was synthesized starting from 9-bromocamphor. The rhodium(I) complex based on this ligand was tested in the hydrogenation of alpha- and beta-amino acid precursors. The activity and selectivity of the catalyst were found to be strongly dependent upon the nature of the substrate. Thus. beta-acetylamino carboxylates were obtained with up to 97% ee. (C) 2002 Published by Elsevier Science Ltd.
A new hydroxydiphosphine as a ligand for Rh(I)-catalyzed enantioselective hydrogenation
作者:Igor V. Komarov、Axel Monsees、Renat Kadyrov、Christine Fischer、Ute Schmidt、Armin Börner
DOI:10.1016/s0957-4166(02)00372-5
日期:2002.8
A new diphosphine ligand bearing a hydroxy group in the backbone was synthesized starting from 9-bromocamphor. The rhodium(I) complex based on this ligand was tested in the hydrogenation of alpha- and beta-amino acid precursors. The activity and selectivity of the catalyst were found to be strongly dependent upon the nature of the substrate. Thus. beta-acetylamino carboxylates were obtained with up to 97% ee. (C) 2002 Published by Elsevier Science Ltd.