名称:
                                Gold-catalyzed direct cycloketalization of acetonide-tethered alkynes in the presence of water
                             
                            
                                摘要:
                                A methodology for the direct preparation of bridged acetals from acetonide-tethered alkynes under gold catalysis in the presence of water has been developed. The bicyclic ring structures bearing a bridged five-membered ring arise from the regioselective bis-oxycyclization by initial attack of the oxygen atom to the internal alkyne carbon. (C) 2012 Elsevier Ltd. All rights reserved.
                             
                                                            
                                    DOI:
                                    10.1016/j.tet.2012.09.030