A Facile Preparation of b-Alky-b-phenylthio-a,b-unsaturated Carbonyl Compounds in a Synthesis of Alkyl Substituted Thiophene-2-carboxylic Esters
                                
                                    
                                        作者:Hsi-Hwa Tso、Yu-Jiun Chen                                    
                                    
                                        DOI:10.3987/com-94-6927
                                    
                                    
                                        日期:——
                                    
                                    A facile two-step or three-step one-flask procedure for a synthesis of beta-alkyl-beta-phenylthio-alpha,beta-unsaturated carbonyl compounds (3a-j) from readily prepared 3-methoxy-1-phenylthio-1-propyne (1) is described. Condensation of 3a-j with methyl thioglycolate readily affords a number of 3-alkyl- and 3,5-dialkylthiophene-2-carboxylic methyl esters.