摘要:
A series of (2-alkoxyaryl)glycinols have been prepared in up to 97.8% ee by asymmetric hydrogenation with cationic rhodium Me-BPE or Me-DuPhos complexes. Others have shown that the presence of ortho substituents on related alpha-arylenamides causes a decrease in enantioselectivity. However, in this study it was found that o-alkoxy alpha-arylenamides were reduced with high enantio selectivity irrespective of substituent size.