作者:Cornelius J. O’ Connor、Mark D. Roydhouse、Anna M. Przybył、Michael D. Wall、J. Mike Southern                                    
                                    
                                        DOI:10.1021/jo902656y
                                    
                                    
                                        日期:2010.4.16
                                    
                                    A new approach to 3-nitro-2-substituted thiophenes has been developed. Exposure of commercially available 1,4-dithane-2,5-diol to nitroalkenes in the presence of 20% triethylamine results in a tandem Michael intramolecular Henry reaction to form the corresponding tetrahydrothiophene. Subsequent microwave irradiation on acidic alumina in the presence of chloranil effects the solvent free dehydration and aromatization to form 3-nitro-2-substituted thiophenes cleanly and rapidly. A simple workup procedure removes the requirement for purification by chromatography in most cases.