59252-47-0Relevant academic research and scientific papers
Free and bound volatile composition and characterization of some glucoconjugates as aroma precursors in melon de olor fruit pulp (Sicana odoriferd)
Parada, Fabian,Duque, Carmenza,Fujimoto, Yoshinori
, p. 6200 - 6204 (2000)
Free and glycosidically bound volatiles obtained from the fruit pulp ofSicana odorifera by liquidliquid extraction and by chromatography, followed by enzymatic hydrolysis with Rohapect D5L, respectively, were analyzed by capillary gas chromatography (HRGC), HRGC-mass spectrometry (HRGC-MS), and HRGC-Olfatometry (HRGC-0) analyses. A total of 37 free volatiles was detected, with the major components being 3-methyl-2-butanol, 3-hydroxy-2-butanone, ethyl 3-hydroxybutanoate, and (Z)-S-hexenol. Among the 22 detected glycosidically bound compounds, 4-hydroxybenzyl methyl ether, 4-hydroxybenzyl alcohol, and 2-phenylethanol were found to be the major constituents. Additionally, two glucoconjugates were isolated in pure form by multilayer coil countercurrent chromatography (MLCCC) of the glycosidic extrac and further purification. Their structures were elucidated by MS and NMR analyses to be the novel [4-(β-D-glucopyranosyloxy)benzyl] 2,3-dihydroxy3-methylbutanoate 2, and the known 4-(β-D-glucopyranosyloxy)benzyl alcohol 1. Compounds 1 and 2 are precursors of 4-hydroxybenzyl alcohol, one of the major volatiles generated by enzymatic hydrolysis of the glycosidic fraction.
Gastrodin Gastrodin and method for the preparation of intermediates for the synthesis of
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, (2017/05/23)
The invention discloses a method for preparing a gastrodin intermediate compound III. The method comprises the following steps: (1) reducing an initial raw material compound I through hydrogen, and obtaining a compound II; (2) reacting the compound II with an acetylation reagent, and obtaining a crude product of a compound III; and (3) recrystallizing the compound III obtained in the step (2), and obtaining a crude product of the compound III. In addition, the invention also provides a method for synthesizing gastrodin. The compound III prepared by the method provided in the invention is easy to recrystallize and high in purity, and a high-purity gastrodin finished product can be obtained.
Highly chemoselective hydrogenation of active benzaldehydes to benzyl alcohols catalyzed by bimetallic nanoparticles
Liu, Chulong,Bao, Hailin,Wang, Dingsheng,Wang, Xinyan,Li, Yadong,Hu, Yuefei
, p. 6460 - 6462 (2015/11/16)
By using novel Pd/Ni bimetallic nanoparticles as a catalyst, the active benzaldehydes were hydrogenated to the corresponding benzyl alcohols as unique products in practical quantitative yields. The undesired catalytic hydrogenolysis of the benzyl alcohol was inhibited completely. By using this hydrogenation as a key step, the total synthesis of the natural product gastrodin was achieved with less total steps and a higher total yield.
A New Antioxidative Glucoside Isolated from Oregano (Origanum vulgare L.)
Nakatani, Nobuji,Kikuzaki, Hiroe
, p. 2727 - 2732 (2007/10/02)
A new antioxidative glucoside (1a) was isolated from the leaves of oregano (Origanum vulgare L.), one of the herbal species belonging to the Family Labiatae.The structure of 1a was determined as 4-(3,4-dihydroxybenzoyloxymethyl)phenyl-β-D-glucopyranoside, on the basis of chemical and spectroscopic evidence.In addition, the structure was confirmed by synthesizing its acetyl derivative (1b).
THE BITTER IRIDOIDS FROM VIBURNUM URCEOLATUM
Hase, Tsunao,Takao, Hideki,Iwagawa, Tetsuo
, p. 1977 - 1982 (2007/10/02)
Four new bitter iridoid glucosides, including three bis-iridoids, were isolated from Viburnum urceolatum and their structures elucidated.They are composed of loganin or deoxyloganin as the aglucone esterified with either aromatic glucoside or with glucose in the 4-position.Key Word Index-Viburnum urceolatum; Caprifoliaceae; iridoids; urceloatoside A-D; bitter components.
