Copper-Catalyzed β-Boration of α,β-Unsaturated Carbonyl Compounds with Tetrahydroxydiborane
                                
                                    
                                        作者:Gary A. Molander、Silas A. McKee                                    
                                    
                                        DOI:10.1021/ol201900d
                                    
                                    
                                        日期:2011.9.2
                                    
                                    The copper-catalyzed beta-boration of alpha,beta-unsaturated carbonyl compounds with tetrahydroxydiborane has been developed. This diboron reagent allows direct, efficient access to boronic acids and their derivatives. Primary, secondary, and tertiary alpha,beta-unsaturated amides are converted to the corresponding beta-trifluoroboratoamides in good to excellent yields. The beta-boration of a variety of alpha,beta-unsaturated esters and ketones is also reported.