Reversal of Regioselection in the Sharpless Asymmetric Aminohydroxylation of Aryl Ester Substrates
作者:Adam J. Morgan、Craig E. Masse、James S. Panek
DOI:10.1021/ol9903032
日期:1999.12.1
[formula: see text] The asymmetric synthesis of beta-hydroxy-alpha-amino acids is reported which relies on the use of alpha,beta-unsaturated aryl ester substrates and the dihydroquinyl alkaloid ligand system (DHQ)2-AQN to control the regio- and enantioselectivity of the asymmetricaminohydroxylation (AA) process. alpha,beta-Unsaturated ester substrates of type 1 have a significant effect on the substrate-ligand