Synthesis of substituted tropones by sequential Rh-catalyzed [5+2] cycloaddition and elimination
                                
                                    
                                        作者:Wangze Song、Bao-min Xi、Ka Yang、Weiping Tang                                    
                                    
                                        DOI:10.1016/j.tet.2015.04.039
                                    
                                    
                                        日期:2015.9
                                    
                                    Highly substituted tropones are prepared from cycloheptatrienes derived from Rh-catalyzed intermolecular [5+2] cycloaddition of 3-acyloxy-1,4-enynes and propargylic alcohols. The intermolecular [5+2] cycloaddition is highly regioselective for a variety of propargylic alcohols. Elimination of the cycloaddition products afforded various substituted tropones. (C) 2015 Elsevier Ltd. All rights reserved.