Application ： Methyl 2-aminothiophene-3-carboxylate may be used to prepare 3-thiaisatoic anhydride via hydrolysis, followed by the reaction with phosgene. Methyl 2-aminothiophene-3-carboxylate may be used to synthesize the following: thieno[2,3-d]pyrimidine-2,4(1H,3H)-dione thieno[2,3-d]pyrimidin-4(3H)one via reaction with formamide methyl 2-(2,5-dimethyl-1H-pyrrol-1-yl)thiophene-3-carboxylate via reaction with hexane-2,5-dione