Synthesis of 2,6-dideoxy-4-S-methyl-4-thio-d-ribo-hexopyranose, a component of the esperamicin oligosaccharide
                                
                                    
                                        作者:François-Yves Dupradeau、Jacques Prandi、Jean-Marie Beau                                    
                                    
                                        DOI:10.1016/0040-4020(95)00059-h
                                    
                                    
                                        日期:1995.3
                                    
                                    Two synthetic approaches to 2,6-dideoxy-4-S-methyl-4-thio-D-ribo pyranose, a component of the oligosaccharide of esperamicins are described. An asymmetric synthesis, starting from the propargylic alcohol dimer, relies on the Sharpless asymmetric epoxidation and the regioselective opening of epoxy alcohols. The other synthesis is based on stereocontrolled transformations of a readily available sugar precursor, D-galactose.