Intermolecular Tandem Addition−Cyclization of Bromoallenes:  A Facile Synthesis of Methylenecyclopropyl Carboxylates and Polysubstituted Furans
                                
                                    
                                        作者:Lubin Xu、Xian Huang、Fangrui Zhong                                    
                                    
                                        DOI:10.1021/ol061993u
                                    
                                    
                                        日期:2006.10.1
                                    
                                    The base-mediated reactions of 1,3-dicarbonyl compounds with bromoallenes used as an allyl dication equivalent were explored. The corresponding dimethyl methylenecyclopropane-1,1-dicarboxylates and 2,3,4-trisubstituted furans were efficiently synthesized.