Catalytic Asymmetric Addition of Thiols to Nitrosoalkenes Leading to Chiral Non-Racemic α-Sulfenyl Ketones
                                
                                    
                                        作者:John M. Hatcher、Mark C. Kohler、Don M. Coltart                                    
                                    
                                        DOI:10.1021/ol2012633
                                    
                                    
                                        日期:2011.8.5
                                    
                                    The first asymmetric organocatalytic sulfenylation of in situ derived nitrosoalkenes leading to chiral nonracemic alpha-sulfenylated ketones is described. The transformation proceeds in an umpolung fashion, relative to enolate/azaenolate methods, and uses simple thiols, thereby obviating the need for electrophilic sulfur reagents.