Reaction of N-sulfinyltrifluoromethanesulfonamide with carbodiimides: Formation of N-trifluoromethanesulfonyl-2,4-dialkyl-1,2,4-thiadiazetidin-3-imine 1-oxides
                                
                                    
                                        作者:Bagrat A. Shainyan、Ljudmila L. Tolstikova                                    
                                    
                                        DOI:10.1016/j.jfluchem.2012.04.016
                                    
                                    
                                        日期:2012.8
                                    
                                    N-sulfinyltrifluoromethanesulfonamide was found to react with diisopropyl- and dicyclohexylcarbodiimides with the formation of N-trifluoromethanesulfonyl-2,4-dialkyl-1,2,4-thiadiazetidin-3-imine 1-oxides. The mechanism includes the [2 pi + 2 pi] cycloaddition resulting in 2-trifluoromethanesulfonyl-3-alkylimino-4-alkyl-1,2,4-thiadiazetidine 1-oxides, the ring opening of the latter, rotation about the C-N bond and the ring closure to the final products. (C) 2012 Elsevier B.V. All rights reserved.