1,3-Dipolar cycloaddition of nitrones with phenylvinyl sulfone. An experimental and theoretical study
                                
                                    
                                        作者:MariFe Flores、Pilar García、Narciso M. Garrido、Carlos T. Nieto、Pilar Basabe、Isidro S. Marcos、Francisca Sanz-González、Jonathan M. Goodman、David Díez                                    
                                    
                                        DOI:10.1016/j.tetasy.2012.01.006
                                    
                                    
                                        日期:2012.1
                                    
                                    The addition of three nitrones to phenylvinylsulfone, 1, has been studied. The stereochemistry previously established by two-dimensional NMR techniques was confirmed by X-ray crystal structure determination. Theoretical studies made us propose that this reaction is not purely regioselective, but by controlling the substituents of nitrone and temperature the regioselectivity increases. (C) 2012 Elsevier Ltd. All rights reserved.