Catalytic Enantioselective Desymmetrization of COT-Monoepoxide. Maximum Deviation from Coplanarity for an S<sub>N</sub>2‘-Cuprate Alkylation
                                
                                    
                                        作者:Federica Del Moro、Paolo Crotti、Valeria Di Bussolo、Franco Macchia、Mauro Pineschi                                    
                                    
                                        DOI:10.1021/ol034554t
                                    
                                    
                                        日期:2003.5.1
                                    
                                    [GRAPHIC]The first alkylative and enantioselective ring-opening of COT-monoepoxide (1) without the occurrence of any ring-contraction-isomerization by the use of in situ-formed organocuprates is reported. Because of the particular geometric constraint of compound 1, this work reports the largest deviation from coplanarity between the pi-orbital of the double bond and the sigma-bond connecting the leaving group ever observed for an S(N)2'-cuprate alkylation.