Asymmetric synthesis of 3,4-dihydroxyglutamic acids via enantioselective reduction of cyclic meso-imide
                                
                                    
                                        作者:Makoto Oba、Shinichi Koguchi、Kozaburo Nishiyama                                    
                                    
                                        DOI:10.1016/j.tet.2004.06.109
                                    
                                    
                                        日期:2004.9
                                    
                                    Stereoselective synthesis of (3S,4S)- and (3R,4R)-series of 3,4-dihydroxyglutamic acids was investigated. The key reaction in this synthesis is asymmetric reduction of meso-imide derived from meso-tartaric acid. Lewis acid-promoted cyanation of the obtained optically active lactam via the acyliminium intermediate followed by standard deprotection procedure afforded the desired 3,4dihydroxyglutamic acids. (C) 2004 Elsevier Ltd. All rights reserved.