名称:
                                Facial selectivity in the reaction of dihalocarbenes with 2-substituted 4,7-dihydro-1,3-dioxepines
                             
                            
                                摘要:
                                The dichloro(dibromo)cyclopropanation of conformationally heterogeneous 2-substituted 4,7-dihydro-1,3-dioxepines was found to afford a low selectivity; endo addition on the side of a remote alkyl substitutent is governed by the pi-facial solvation of substrates.
                             
                                                            
                                    DOI:
                                    10.1016/j.mencom.2007.05.013