Preparation of seven-membered rings by the reaction of cyclopropylcarbene-tungsten and molybdenum complexes with alkynes
                                
                                    
                                        作者:James W. Herndon、Metin Zora、Paren P. Patel、Gautam Chatterjee、Julius J. Matasi、Seniz U. Tumer                                    
                                    
                                        DOI:10.1016/s0040-4020(01)87266-5
                                    
                                    
                                        日期:1993.1
                                    
                                    The reaction between alkynes and cyclopropylcarbene-tungsten and molybdenum complexes has been examined. Depending upon the conditions of the reaction, either cycloheptadienones or furanones are obtained. The scope, limitation, and mechanistic rationale for observed selectivities are discussed.