Synthesis of furanosyl α-C-glycosides derived from 4-chloro-4-deoxy-α-d-galactose and their cytotoxic activities
摘要:
Condensation of a new unnatural sugar 1 with 1,3-dicarbonyl compounds in the presence of anhydrous zinc chloride gave the polyhydroxyalkyl-furans in excellent yields. Further modification afforded the corresponding furanosyl alpha-C-glycoside derivatives. The absolute configuration of 3-acetyl- 2-methyl-5-(2'-chloro-D-galacto-tetritol-1-yl)-furan was confirmed by single-crystal X-ray analysis. The in vitro cytotoxic activities of these furanosyl C-glycosides were also investigated. (c) 2007 Elsevier Ltd. All rights reserved.
Conversion of Unprotected Aldose Sugars to Polyhydroxyalkyl and <i>C</i>-Glycosyl Furans via Zirconium Catalysis
作者:Nima Ronaghi、David M. Fialho、Christopher W. Jones、Stefan France
DOI:10.1021/acs.joc.0c02176
日期:2020.12.4
An efficient, zirconium-catalyzed conversion of unprotected aldose sugars with acetylacetone to polyhydroxyalkyl furans or C-glycosylfurans is reported. The furan products are formed in up to 93% yield using 5–10 mol % ZrCl4. Pentoses are readily converted at room temperature, while hexoses and their oligosaccharides require mild heating (i.e., 50 °C). Efficient conversions of glycolaldehyde, glyceraldehyde
SiO<sub>2</sub>-Supported CeCl<sub>3</sub>·7H<sub>2</sub>O−NaI Lewis Acid Promoter: Investigation into the Garcia Gonzalez Reaction in Solvent-Free Conditions<sup>⊥</sup>
作者:Giuseppe Bartoli、José G. Fernández-Bolaños、Giustino Di Antonio、Gioia Foglia、Sandra Giuli、Roberto Gunnella、Michele Mancinelli、Enrico Marcantoni、Melissa Paoletti
DOI:10.1021/jo070384c
日期:2007.8.1
condensation of aldose sugars with β-dicarbonyl compounds produces furan derivatives having polyhydroxyalkylated alkyl side chains; this reaction is known as the Garcia Gonzalez reaction. Despite the fact that these polyhydroxyalkyl furans are interesting scaffolds for synthetic chemists to utilize in the synthesis of a variety of biologically interesting molecules, the reported approach suffers from harsh
Synthesis of furanosyl α-C-glycosides derived from 4-chloro-4-deoxy-α-d-galactose and their cytotoxic activities
作者:Lin Yan、Gui-Fu Dai、Jian-Li Yang、Feng-Wu Liu、Hong-Min Liu
DOI:10.1016/j.bmcl.2007.03.079
日期:2007.6
Condensation of a new unnatural sugar 1 with 1,3-dicarbonyl compounds in the presence of anhydrous zinc chloride gave the polyhydroxyalkyl-furans in excellent yields. Further modification afforded the corresponding furanosyl alpha-C-glycoside derivatives. The absolute configuration of 3-acetyl- 2-methyl-5-(2'-chloro-D-galacto-tetritol-1-yl)-furan was confirmed by single-crystal X-ray analysis. The in vitro cytotoxic activities of these furanosyl C-glycosides were also investigated. (c) 2007 Elsevier Ltd. All rights reserved.