H. Matsuura et al., 4 NEW POLYACETYLENIC GLUCOSIDES, METHYL BETA-D-GLUCOPYRANOSYL HELIANTHENATE C-F, FROM JERUSALEM-ARTICHOKE (HELIANTHUS-TUBEROSUS L), Bioscience, biotechnology, and biochemistry, 57(9), 1993, pp. 1492-1498
Four new polyacetylenic glucosides isolated from the leaf of Jerusalem
artichoke (Helianthus tuberosus L.) were characterized as methyl beta
-D-glucopyranosyl helianthenate C (5), D (6), E (7), and F (8). The ab
solute stereochemistry of the glucosyloxymethine was also determined t
o be of R configuration by preparing the relative compounds with Sharp
less asymmetric epoxidation as the kev step and source of optical acti
vity.