名称:
                                Catalytic enantioselective cyclopropanation of allylic alcohols using recyclable fluorous disulfonamide ligand
                             
                            
                                摘要:
                                Cyclopropanation of allylic alcohols with Et(2)Zn and CH(2)I(2) in the presence of a catalytic amount of fluorous disulfonamide 3 afforded the corresponding cyclopropylmethanols in 69-96% yield with 49-83% ee. The fluorous ligand 3 was readily recovered from the reaction mixture by the fluorous solid-phase extraction (FSPE) and could be reused without a significant loss of the catalytic activity and enantioselectivity. (C) 2008 Elsevier Ltd. All rights reserved.
                             
                                                            
                                    DOI:
                                    10.1016/j.tetlet.2008.07.125