title: The glycosidic precursor of (Z)-5-ethylidene-2(5H)-furanone in Halocarpus biformis juvenile foliage.
abstract: A new glycosidic lactone, (5R,6R)-5-(1-hydroxyethyl)-2(5H)-furanone beta-D-glucopyranoside, has been identified as the principal precursor of (Z)-5-ethylidene-2(5H)-furanone in juvenile foliage of the New Zealand tree Halocarpus biformis. Three related lactone glycosides were isolated in smaller amounts, together with the known phenolic glycosides pyroside, arbutin and picein. The principal lactone glycoside underwent facile elimination of glucose, in neutral or basic conditions, to yield (Z)-5-ethylidene-2(5H)-furanone and its E-isomer. This lactone glycoside was also detected in foliage of H. bidwillii and H. kirkii.
authors.affiliation: Department of Chemistry, University of Otago, New Zealand.
authors.forename: N B
authors.initials: NB
authors.lastname: Perry
authors.forename: M H
authors.initials: MH
authors.lastname: Benn
authors.forename: L M
authors.initials: LM
authors.lastname: Foster
authors.forename: A
authors.initials: A
authors.lastname: Routledge
authors.forename: R T
authors.initials: RT
authors.lastname: Weavers
mesh_terms: D000818:Animals; D000890:Anti-Infective Agents; D016477:Artifacts; D002460:Cell Line; D004354:Drug Screening Assays, Antitumor; D005663:Furans / Q000737:chemistry / Q000302:isolation & purification* / Q000378:metabolism* / Q000494:pharmacology; D005960:Glucosides / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D007783:Lactones / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D007941:Leukemia P388; D009682:Magnetic Resonance Spectroscopy; D051379:Mice; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D009520:New Zealand; D013045:Species Specificity; D014197:Trees
chemical_list: C100513:5-(1-hydroxyethyl)-2(5H)-furanone glucopyranoside; C100512:5-ethylidene-2(5H)-furanone; D000890:Anti-Infective Agents; D005663:Furans; D005960:Glucosides; D006027:Glycosides; D007783:Lactones