Efficient macrocyclization by means of 2-nitrobenzenesulfonamide and total synthesis of lipogrammistin-A
                                
                                    
                                        作者:Toshiyuki Kan、Akiko Fujiwara、Hideki Kobayashi、Tohru Fukuyama                                    
                                    
                                        DOI:10.1016/s0040-4020(02)00626-9
                                    
                                    
                                        日期:2002.8
                                    
                                    Synthesis of medium- and large-sized cyclic amines using alkylation with 2-nitrobenzenesulfonamides is described. Using either conventional alkylation procedures or Mitsunobu conditions, the cyclization reaction proceeded in a highly efficient manner. The usefulness of this methodology has been fully demonstrated in the total synthesis of lipogrammistin-A (9), an 18-membered cyclic polyamine. (C) 2002 Published by Elsevier Science Ltd.