Application of Chiral Mixed Phosphorus/Sulfur Ligands to Palladium-Catalyzed Allylic Substitutions
作者:David A. Evans、Kevin R. Campos、Jason S. Tedrow、Forrest E. Michael、Michel R. Gagné
DOI:10.1021/ja992543i
日期:2000.8.23
allylic substitution of cycloalkenyl acetates showed that 49g afforded the highest enantioselectivities (91−97% ee). Application of this methodology to heterocyclic substrates was developed as an efficient approach to the enantioselective synthesis of 3-substituted piperidines and dihydrothiopyrans. Models for asymmetric induction are discussed based on the absolute st...