“…13 Amides can be generated from the corresponding carboxylic acids and amines by a variety of methods. The reaction has been carried out by a variety of methods such as anhydride, acid chloride, or via in situ coupling agents such as dicyclohexylcarbodiimide, 14 N,Ncarbonyldiimidazole, 15 benzotriazol-1-yldiethylphosphate(BDP), 16 1,1 -carbonylbis(3-methylimidazo-lium)triflate (CBMIT), 17 Lawesson's reagent, 18 Ti(OBu) 4 , 19 Sn[N(TMS) 2 ] 2 , 20 2-ethoxy-1-(ethoxycarbonyl)-1,2-dihydroquinoline (EEDQ), 21 sulfonylchloride, 22 and N,N-bis[2-oxo-3-oxazolidinyl]phosphorodiamidic chloride. 23 Extending our work on the use of N-halosulfonamides 24 in organic synthesis, we now report a convenient method for the conversion of carboxylic acids into esters and amides using a new, cheap, and easily made reagent, N,N -dibromo-N,N -1,2-ethanediyl bis( p-toluenesulfonamide), or BNBTS ( Figure 1).…”