名称:
                                Heterocyclic Synthesis by C-C Bond Formation. Thionium Ion-mediated Preparation of Substituted Pyrrolidines and Piperidines
                             
                            
                                摘要:
                                Dithioacetal-S,S-dioxides 6 and 7 undergo cyclisation to give pyrrolidines and piperidines upon exposure to Lewis acid. An unexpected tandem cyclisation of 5 to give 10 is described. (C) 1997 Elsevier Science Ltd. All rights reserved.
                             
                                                            
                                    DOI:
                                    10.1016/s0040-4039(97)10472-5