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.
The first asymmetric total synthesis of (R)-tuberolactone, (S)-jasmine lactone and (R)-δ-decalactone
作者:Gowravaram Sabitha、V. Bhaskar、J.S. Yadav
DOI:10.1016/j.tetlet.2006.08.135
日期:2006.11
A general synthetic approach has been developed for the firstasymmetrictotalsynthesis of tuberolactone 1, jasmine lactone 2 and δ-decalactone 3. The key step is the selective hydrogenation of triple and endocyclic double bonds in the key intermediate 4.
Synthesis of (−)-(6R)- and (+)-(6S)-Tetrahydro-6-[(Z)-pent-2-enyl]-2H-Pyran-2-one, lactones from Jasminum grandiflorumL. and from Polianthes tuberosaL.
茉莉(Jasminum grandiflorum)的合成(-)-(6 R)-和(+)-(6 S)-四氢-6-[(Z)-戊-2-烯基] -2 H-吡喃-2-酮L.和来自Polianthes tuberosa L.