Simple access to highly enantiomerically enriched (S)-3-methyl-1-pentanol, (S)-3-methyl-1-pentene, (2R,3S)-2-deuterio-3-methyl-1-pentanol and (2S,3S)-3-methyl-2-pentanol from natural (L)-isoleucine
Enantioselective introduction of fluoride into organic compounds
作者:Stefan Bruns、Günter Haufe
DOI:10.1016/s0022-1139(00)00249-9
日期:2000.7
enantioselective epoxide ring opening with hydrofluorinating agents mediated by chiral non-racemic Lewis acids is reported. The reaction of cyclohexene oxide (1) with KHF2/18-crown-6 is trans-diastereoselective and proceeds with 55% ee to form (R,R)-(−)-2-fluorocyclohexanol (2) in the presence of Jacobsen’s (S,S)-(+)-(salen)chromium chloridecomplex A. From racemic epoxides such as styrene oxide (9) or phenyl