Novel generation and ring closure of 1,3-thiaza-1,3-butadiene S-oxides through thermal cycloreversion of 6H-1,3,5-oxathiazine S-oxides
                                
                                    
                                        作者:Kazuaki Shimada、Islam Md. Rafiqul、Masanobu Sato、Shigenobu Aoyagi、Yuji Takikawa                                    
                                    
                                        DOI:10.1016/s0040-4039(03)00329-0
                                    
                                    
                                        日期:2003.3
                                    
                                    Heating of 6H-1,3,5-oxathiazine S-oxides efficiently afforded 1,2,4-oxathiazoles through the mechanism involving thermal cycloreversion of the substrates and the subsequent ring closure of the intermediary 1,3-thiaza-1,3-butadiene S-oxides. (C) 2003 Elsevier Science Ltd. All rights reserved.