Synthesis of phosphorylated sulfoximines and sulfinamides and their application as ligands in asymmetric metal catalysis
摘要:
Starting from inexpensive materials and following simple protocols various N-phosphorylated sulfoximines and sulfinamides have been synthesized. The newly prepared compounds were then applied as chiral ligands in asymmetric transition metal catalysis. Phosphorus triamide-type ligands derived from (S)-glutamic acid were found to be the most efficient stereoselectors in enantioselective palladium-catalyzed allylic substitutions (up to 97% ee). On the other hand, diamidophosphite-type structures stemming from (S)-proline were the best ligands in rhodium-catalyzed hydrogenation reactions (up to 84% ee). (C) 2011 Elsevier Ltd. All rights reserved.
Synthesis of phosphorylated sulfoximines and sulfinamides and their application as ligands in asymmetric metal catalysis
作者:Eduard B. Benetskiy、Carsten Bolm
DOI:10.1016/j.tetasy.2011.02.005
日期:2011.2
Starting from inexpensive materials and following simple protocols various N-phosphorylated sulfoximines and sulfinamides have been synthesized. The newly prepared compounds were then applied as chiral ligands in asymmetric transition metal catalysis. Phosphorus triamide-type ligands derived from (S)-glutamic acid were found to be the most efficient stereoselectors in enantioselective palladium-catalyzed allylic substitutions (up to 97% ee). On the other hand, diamidophosphite-type structures stemming from (S)-proline were the best ligands in rhodium-catalyzed hydrogenation reactions (up to 84% ee). (C) 2011 Elsevier Ltd. All rights reserved.