A highly efficient procedure for glucosylation of flavonoids by acetobromoglucose is described. Glucosylation is carried out in a two-phase system CHCl3/H2O over 96 h using tetrabutylammonium bromide as phase-transfer catalyst. A purification procedure can be performed without column chromatography, and the yields of the glucosylated flavonoids are mostly quantitative. Acetylated glucosides were deprotected with sodium methanolate to afford the desired glucosides of flavonoids.
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作者:Yu. M. Volovenko、T. V. Shokol
DOI:10.1023/a:1024738018872
日期:——
US4051099A
申请人:——
公开号:US4051099A
公开(公告)日:1977-09-27
3-(4-Phenyl-1,2,4-triazol-3-yl)chromones
作者:T. V. Shokol、V. A. Turov、A. V. Turov、N. V. Krivokhizha、V. V. Semenyuchenko、V. P. Khilya