Parallel synthesis of structurally diverse aminobenzimidazole tethered sultams and benzothiazepinones
                                
                                    
                                        作者:Sureshbabu Dadiboyena、Adel Nefzi                                    
                                    
                                        DOI:10.1016/j.tetlet.2012.09.135
                                    
                                    
                                        日期:2012.12
                                    
                                    A solid-phase methodology to construct aminobenzimidazole tethered sultams and benzothiazepinones from commercial amino acids, amines, carboxylic acids, and sulfonyl chlorides is described. Coupling of Fmoc-Cys(Trt)-OH to resin-bound aminobenzimidazole scaffold provided an essential precursor for the construction of a variety of seven membered benzofused cyclic sulfonamides and thiazepinones via palladium catalyzed Buchwald-Hartwig type intramolecular cyclization. (C) 2012 Elsevier Ltd. All rights reserved.