Enantioselective Syntheses and Configuration Assignments of γ-Chiral Butenolides from<i>Plagiomnium undulatum</i>: Butenolide Synthesis from Tetronic Acids
作者:Tobias Kapferer、Reinhard Brückner、Axel Herzig、Wilfried A. König
DOI:10.1002/chem.200401135
日期:2005.3.18
Both enantiomers of the gamma-chiral alpha,beta-dimethylated butyrolactones nat-1 and nat-2 from the moss Plagiomnium undulatum were synthesized stereoselectively through butenolides and tetronicacids, respectively. The configuration of the natural products was determined by GLC comparisons with mono(3-O-acetyl-6-O-tert-butyldimethylsilyl-2-O-methyl)hexakis(6-O-tert-butyldime thylsilyl-2,3-di-O-m
The present invention relates to the use of nonenolide for imparting, modifying and/or intensifying one or more smell or flavour impressions from the group consisting of hay, coumarin, lactone and richness in the mouth.