名称:
                                Two new efficient preparations of enantiopure 2,2′-dihydroxy-6,6′-dimethoxy-1,1′-biphenyl
                             
                            
                                摘要:
                                Two new useful methods for the preparation of diol 1 starting from available compounds are described. Separation of the two enantiomers entails resolution of racemic diol 1 via the corresponding diastereomeric N-methylated phosphorothioamidates. Their separation by recrystallization followed by reduction afforded diol (aS)-1 and (aR)-1 in 100% and 72% ee, respectively. (C) 1997 Elsevier Science Ltd.
                             
                                                            
                                    DOI:
                                    10.1016/s0957-4166(97)00021-9