The stereoselective α-alkylation of chiral β-hydroxy esters and some applications thereof
作者:G. Fráter、U. Müller、W. Günther
DOI:10.1016/s0040-4020(01)82413-3
日期:1984.1
The stereoselectivity of the α-alkylation of chiral β-hydroxyester is discussed. The configuration of the alkylated product was proved chemically (Scheme 2). A one pot aldol-alkylation reaction was developed leading stereoselectively to racemic (s*,s*)-α-alkyl-β-hydroxy ester (Scheme 3,4). Baker's yeast reduction of 2-alkyl-3-keto ester led to valuable chiral (2RS,3S)-intermediates, which were converted
On the stereoselectivity of the α-alkylation of β-hydroxy esters. Enantioselective synthesis of 4,4- and 6,6-disubstituted cyclohex-2-en-1-ones.
作者:György Fráter
DOI:10.1016/0040-4039(81)80116-5
日期:1981.1
Stereoselectiveα-alkylation of the optically active 6-hydroxyester 1 gives rise to 2, which was converted to the 1,5-diketone 4. Regioselective aldolcondensation of the latter furnished (S)-5 and (S)-6 respectively, each with an e.e. of 86%.