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