A Chemoenzymatic, Preparative Synthesis of the Isomeric Forms ofp-Menth-1-en-9-ol: Application to the Synthesis of the Isomeric Forms of the Cooling Agent 1-Hydroxy-2,9-cineole
作者:Stefano Serra、Claudio Fuganti、Francesco G. Gatti
DOI:10.1002/ejoc.200701010
日期:2008.2
A preparative-scale synthesis of the four p-menth-1-en-9-ol isomers 2a–5a has been achieved by means of two chemoenzymatic processes. Both synthetic pathways start from the enantiomeric forms of limonene that are converted into p-mentha-1,8-dien-9-al isomers 12 and 15. The baker's yeast mediated reduction of the latter aldehydes afforded compounds 3a and 5a, respectively, with very high enantioselectivity
Scalable total syntheses of (−)-hapalindole U and (+)-ambiguine H
作者:Thomas J. Maimone、Yoshihiro Ishihara、Phil S. Baran
DOI:10.1016/j.tet.2014.11.010
日期:2015.6
produces a class of biogenetically related indole natural products that include hapalindoles and ambiguines. In this full account, a practical route to the tetracyclic hapalindole family is presented by way of an eight-step, enantiospecific, protecting-group-free totalsynthesis of (-)-hapalindole U that features an oxidative indole-enolate coupling. With gram-scale access to hapalindole U, the first total
Determination of the Configuration of Wine Lactone
作者:Helmut Guth
DOI:10.1002/hlca.19960790606
日期:1996.9.18
coconut-like smelling odorant 1, named ‘winelactone’, was isolated from different wine varieties. The chemical structure of this compound, which has not yet been detected in wine or a food, was identified by high-resolution mass spectrometry (HR-MS) as 3a,4,5,7a-tetrahydro-3,6-dimethylbenzofuran-2(3H)-one. For the evaluation of the configuration of winelactone, stereochemically controlled syntheses
Biosynthesis of Stereoisomers of Dill Ether and Wine Lactone by <i>Pleurotus sapidus</i>
作者:Tobias Trapp、Tabea Kirchner、Florian Birk、Marco Alexander Fraatz、Holger Zorn
DOI:10.1021/acs.jafc.8b07263
日期:2019.12.11
fungus Pleurotus sapidus (PSA) biosynthesizes the bicyclic monoterpenoids 3,6-dimethyl-2,3,3a,4,5,7a-hexahydrobenzofuran (dill ether) (1) and 3,6-dimethyl-3a,4,5,7a-tetrahydro-1-benzofuran-2(3H)-one (winelactone) (2). Submerged cultures grown in different media were analyzed by gas chromatography-mass spectrometry. The stereochemistry of the formed isomers was elucidated by comparing their retention indices