Preparation of α-silyl- or α,α-bis(silyl)-substituted alkylcopper reagents and their synthetic use
                                
                                    
                                        作者:Junichi Kondo、Atsushi Inoue、Yuki Ito、Hiroshi Shinokubo、Koichiro Oshima                                    
                                    
                                        DOI:10.1016/j.tet.2005.01.101
                                    
                                    
                                        日期:2005.3
                                    
                                    Treatment of chlorobis(methyldiphenylsilyl)methyllithium with various alkyl and aryl Grignard reagents and CuCN center dot 2LiCl afforded 1,1-disilylalkylcopper species. The aerobic oxidation of the resulting copper reagents provided a variety of acylsilanes in good yields. Meanwhile, treatment of dichloro(methyldiphenylsilyl)methyllithum with Bu2CuLi center dot LiCN provided 1-cyano-1-silylalkylcopper species via consecutive double 1,2-migration of alkyl and cyano groups. (c) 2005 Elsevier Ltd. All rights reserved.