syn-Selective boron mediated aldol condensations for the asymmetric synthesis of β-hydroxy-α-amino acids
                                
                                    
                                        作者:S Caddick、N.J Parr、M.C Pritchard                                    
                                    
                                        DOI:10.1016/s0040-4039(00)00734-6
                                    
                                    
                                        日期:2000.7
                                    
                                    Imidazolidinone-bound glycine enolate derivatives have been shown to undergo aldol condensation with aromatic and aliphatic aldehydes in good yields and with excellent stereocontrol (62-84%, 93-95% d.e.). Removal of the pendant imidazolidinone auxiliary and hydrogenolysis affords the beta-hydroxy-alpha-amino acid derivatives. (C) 2000 Elsevier Science Ltd. All rights reserved.