AZULENOPENTATHIEPIN: PREPARATION AND CONVERSION INTO AZULENES WITH SULFUR GROUPS AT THE 1- AND 2-POSITIONS
                                
                                    
                                        作者:Ohki Sato、Atsushi Sakai、Masami Aoki、Takaaki Kuramochi、Juzo Nakayama                                    
                                    
                                        DOI:10.3987/com-12-s(n)80
                                    
                                    
                                        日期:——
                                    
                                    Azulenopentathiepin was prepared by the reaction of azulene with elemental sulfur in boiling pyridine. Bis(thiolate) generated from the pentathiepin reacted with electrophiles such as iodomethane, methyl chloroformate, N,N'-carbonyldiimidazole and N,N'-thiocarbonyldiimidazole to afford the corresponding azulene derivatives. Desulfuration of the pentathiepin and the successive reaction with DMAD or a Pd(0) reagent afforded a 1,4-dithiin compound or Pd complexes.