名称:
                                Chelation-controlled ester-derived titanium enolate aldol reaction: diastereoselective syn-aldols with mono- and bidentate aldehydes
                             
                            
                                摘要:
                                A chelation-controlled and highly diastereoselective synthesis of syn-aldols is described. Aldol reaction of (S)-valinolderived ester with a variety of aldehydes proceeded with high syn-diastercoselectivities (up to 99:1) and isolated yields (94%). (C) 2002 Elsevier Science Ltd. All rights reserved.
                             
                                                            
                                    DOI:
                                    10.1016/s0040-4039(02)01113-9