A CONVENIENT SYNTHESIS OF α-BROMOKETONES FROM VINYLOXYBORANES OBTAINED BY THE REACTION OF ORGANOBORANES WITH α, β-UNSATURATED KETONES
                                
                                    
                                        作者:Norio Miyaura、Masahiro Harada、Mitsuomi Itoh、Akira Suzuki                                    
                                    
                                        DOI:10.1246/cl.1973.1145
                                    
                                    
                                        日期:1973.11.5
                                    
                                    Free-radical addition reaction of organoboranes to α, β-unsaturated ketones forms corresponding vinyloxyboranes (3) as the intermediate. Methanolysis of the dibromoderivatives which should be obtained by bromination of the initially formed vinyloxyboranes provides a convenient one-step synthetic procedure of α-bromoketones from organoboranes in good yields.
                                    有机
硼烷与 α, β-不饱和酮的自由基加成反应形成相应的
乙烯基氧基
硼烷 (3) 作为中间体。应该通过对最初形成的
乙烯基氧基
硼烷进行
溴化而获得的二
溴代衍
生物的
甲醇分解提供了一种方便的一步合成方法,从有机
硼烷中以良好的收率合成 α-
溴酮。