Synthesis of Acetylated Ranunculin Diastereoisomers and δ–Glucosyloxy–γ–Oxo Esters from α or β Glucosylmethylfurfural
摘要:
The alpha and beta acetylated (5-formyl-2-furyl)methyl-D-glueopyranosides were synthesized and converted into acetylated ranunculin diastereoisomers and delta-glucosyloxy-gamma-oxo esters.
γ-heterosubstituted γ-methyl-α,β-butenolides are presented, starting mainly from C3 synthons (glyceraldehyde, glycidaldehyde, acrolein and 2,3-epoxypropyl ethers). Good general methods for the preparation of γ-hydroxymethyl-α,β-butenolide 2, several of its ether derivatives, as well as of γ-bromomethyl-α,β-butenolide 5, are given. The reactivities of these structurallysimple but highly functionalized compounds
intramolecular reaction, overall, a pyranyl group adds to the α position of the furanone. The effect of conformation was first investigated with compounds 9 a,b carrying an additional substituent on the tether between the furanone and pyranyl moiety. Further information on the effect of conformation and the relativeconfiguration at the pyranyl anomeric centre and the furanone moiety was obtained from
Synthesis of Acetylated Ranunculin Diastereoisomers and δ–Glucosyloxy–γ–Oxo Esters from α or β Glucosylmethylfurfural
作者:Louis Cottier、Gérard Descotes、Yaya Soro
DOI:10.1081/car-200049688
日期:2005.1
The alpha and beta acetylated (5-formyl-2-furyl)methyl-D-glueopyranosides were synthesized and converted into acetylated ranunculin diastereoisomers and delta-glucosyloxy-gamma-oxo esters.