Stereoselective synthesis of 4-C-methyl-2,3,5-tri-O-benzyl-d-ribofuranose and 4-C-methyl-2,3,5-tri-O-benzyl-l-lyxofuranose
                                
                                    
                                        作者:Serge H Boyer、Bheemarao G Ugarkar、Mark D Erion                                    
                                    
                                        DOI:10.1016/s0040-4039(03)00877-3
                                    
                                    
                                        日期:2003.5
                                    
                                    Sugar intermediates 4-C-metliyl-2,3,5-tri-O-benzyl-D-ribofuranose (3b) and 4-C-methyl-2,3,5-tri-O-benzyl-L-lyxofuranose (8a) were synthesized by addition of alkylithium reagents to pentanones 3a,b. The nucleophilic additions proceeded with good stereoselectivity and good yields to give the titled compounds in four steps from perbenzylated methyl D-ribofuranoside and methyl 5'-deoxy-D-ribofuranoside. (C) 2003 Elsevier Science Ltd. All rights reserved.