Optically active α-hydroxy ketones 4 have been prepared in high enantioselectivity by the catalytic, enantioselective oxidation of easily available and stable (E)-enol phosphates 2 by (salen) Mn(III) complex.
The asymmetric oxidation of a variety of differently substituted, acyclic and cyclic enol phosphates using the Sharpless AD-reagents AD-mix-alpha and AD-mix-beta, and a fructose derived chiral ketone as a catalyst, afforded the corresponding alpha-hydroxy ketones in high enantioselectivity and good yield. The influence of steric and electronic factors of the substrates on the facial stereoselectivity in the reported oxidations was studied. (C) 2012 Elsevier Ltd. All rights reserved.
MAIGROT, N.;MAZALEYRAT, J. -P.;WELVART, Z., J. ORG. CHEM., 1985, 50, N 20, 3916-3918
作者:MAIGROT, N.、MAZALEYRAT, J. -P.、WELVART, Z.
DOI:——
日期:——
ENDERS, D.;LOTTER, H.;MAIGROT, N.;MAZALEYRAT, J. -P.;WELVART, Z., NOUV. J. CHIM., 1984, 8, N 12, 747-750
作者:ENDERS, D.、LOTTER, H.、MAIGROT, N.、MAZALEYRAT, J. -P.、WELVART, Z.