Highly regio- and diastereoselective Friedel-Crafts alkylation of phenols. Synthesis of 2-hydroxymandelic esters.
                                
                                    
                                        作者:F. Bigi、G. Casnati、G. Sartori、C. Dalprato、R. Bortolini                                    
                                    
                                        DOI:10.1016/s0957-4166(00)82274-0
                                    
                                    
                                        日期:1990.1
                                    
                                    Ortho-hydroxyalkylaton of phenol substrates was performed via coordinative complexes of metal phenolates with chiral glyoxylates:  optically active 2-hydroxymandelic esters have been obtained with good yields and very high diastereoselectivity (up to 94% d.e.).