Nickel-Catalyzed Selective Conversion of Two Different Aldehydes to Cross-Coupled Esters
                                
                                    
                                        作者:Yoichi Hoshimoto、Masato Ohashi、Sensuke Ogoshi                                    
                                    
                                        DOI:10.1021/ja109908x
                                    
                                    
                                        日期:2011.4.6
                                    
                                    In the presence of a Ni(0)/NHC catalyst, an equimolar mixture of aliphatic and aryl aldehydes can be employed to selectively yield a single cross-coupled ester. This reaction can be applied to a variety of aliphatic (1 degrees, 2 degrees, cyc-2 degrees, and 3 degrees) and aryl aldehyde combinations. The reaction represents 100% atom efficiency and generates no waste. Mechanistic studies have revealed that the striking feature of the reaction is the simultaneous coordination of two aldehydes to Ni(0).