Brønsted Acid-Catalyzed Insertion of Aryldiazoacetates to sp<sup>2</sup> Carbon−CHO Bond:  Facile Construction of Chiral All-Carbon Quaternary Center
                                
                                    
                                        作者:Takuya Hashimoto、Yuki Naganawa、Keiji Maruoka                                    
                                    
                                        DOI:10.1021/ja710532j
                                    
                                    
                                        日期:2008.2.1
                                    
                                    Aryldiazoacetates could be formally inserted into the carbon-carbon bond of the Bronsted acid-activated aromatic and alpha,beta-unsaturated aldehydes. Use of phenylmenthyl esters allowed the asymmetric induction at the inserted all-carbon quaternary carbon center with the excellent stereoselectivities.