STEREOISOMERIC FLAVOR COMPOUNDS - LXXX - ALKYL-BRANCHED ALKANALS - STEREODIFFERENTIATION, STRUCTURE ELUCIDATION AND STRUCTURE-FUNCTION RELATIONSHIP

The direct enantioseparation of 2-methylbutanal, 2-methylpentanal, 2-e thylhexanal, 3-methylpentanal and 4-methylhexanal was achieved using e nantioselective gas chromatography and the chiral stationary phase hep takis-[2,3-di-O-acetyl-6-O-tert. butyldimethylsilyl]-beta-cyclodextrin (DIAC-TBDMS-beta-CD). Odour characteristics and threshold values of d etection for compounds were evaluated by enantioselective gas chromato graphy/olfactometry. Enantiopure reference compounds with defined abso lute configurations were synthesized starting from the corresponding a lcohols or acids which were commercially available or prepared in the laboratory.