97039-07-1Relevant articles and documents
Generation of (E)-1-(2,3,6-trimethylphenyl)buta-1,3-diene from C 13-norisoprenoid precursors
Cox, Agnieszka,Skouroumounis, George K.,Elsey, Gordon M.,Perkins, Michael V.,Sefton, Mark A.
, p. 6777 - 6783 (2005)
Three C13-norisoprenoid compounds, 3,6,9-trihydroxymegastigma-4, 7-diene (6), 3,4,9-trihydroxymegastigma-5,7-diene (4), and the actinidols (8), have all been synthesized and subjected to acid hydrolysis. All three were shown to generate (E)-1-(2,3,6-trimethylphenyl)buta-1,3-diene (1) under wine conservation conditions. At 45°C, approximately 4000-5000 ng/L of 1 was formed from 1.0 mg/L of precursor, after 173 days, while at 25°C more wine-like amounts (200-600 ng/L) were observed. A glucoside, 4,5-dihydrovomifoliol-C9-β-D-glucopyranoside (9b), was isolated from grapevine leaves by multilayer coil countercurrent chromatography (MLCCC), and its stereochemistry was deduced as being (5R, 6S, 9R) by NMR and CD spectroscopy. Hydrolysis of this glucoside produced 1, but in quantities insufficient to account for the levels observed in wine.
THE ACTINIDOLS: NOR-ISOPRENOID COMPOUNDS IN GRAPES, WINES AND SPIRITS
Dimitriadis, Eugene,Strauss, Christopher R.,Wilson, Bevan,Williams, Patrick J.
, p. 767 - 770 (2007/10/02)
The isomeric actinidols, 2,2,6-trimethyl-8-(1-hydroxy)ethyl-7-oxabicyclonona-4,9-dienes, have been identified in steam distillates of juices from Vitis vinifera grape vars.Muscat of Alexandria, Chardonnay and Doradillo.The two major isomers of this compound, which were also commonly observed in wines and brandies, were tentatively identified as having a trans-stereochemistry about the dihydrofuran ring in the molecule. - Key Word Index - Vitis vinifera; Vitaceae; grapes; wines; distilled spirits; aroma volatiles; C13 nor-isoprenoid; actinidols.