Optical resolution of six chiral fragrant lactones (delta-jasmine lactone, massoia lactone, tuberolactone, pentynyllactone, delta-decalactone, and gamma-nonalactone) was investigated by means of either the diastereomeric salt formation method or the diastereomeric amide formation method. Using these procedures, we obtained each enantiomer from five of the six lactones, except for massoia lactone. All five lactones were obtained in a good yield and with high optical purity. Sensoric characteristics on both enantiomers and racemic modification of four lactones are given.
Novel Approach to the Synthesis of 6-Substituted 5,6-Dihydro-2(2H)-pyranones
作者:Charles Fehr、Jos� Galindo、G�nther Ohloff
DOI:10.1002/hlca.19810640503
日期:1981.7.22
Easily accessible dihydropyrans 9, 10, 12 and 19 are precursors for the synthesis of 6-substituted5,6-dihydro-2 (2H)-pyranones and 6-substituted tetrahydro-2-pyranones. Syntheses of massoia lactone (3), argentilactone (5), tuberolactone (4) and jasmine lactone (2) from acrolein (6), acrolein dimer (7) or glutaraldehyde (16) are described.