| abstract |
4-[(4,5-dihydro-3-methoxy-4-methyl-5-oxo-1H-1,2,4-triazol-1-yl)carbonyl)sulfamoyl]-5 -The preparation method of methylthiophene-3-methyl formate. The present invention relates to the preparation of 4-methoxycarbonyl-2-methylthiophene in the presence of a 1-substituted imidazole base or in the presence of a mixture of bases comprising a 1-substituted imidazole base (N-alkylimidazole). -3-sulfonyl chloride to prepare 4-[(4,5-dihydro-3-methoxy-4-methyl-5-oxo-1H-1,2,4-triazol-1-yl)carbonyl ) sulfamoyl]-5-methylthiophene-3-meth for methyl formate. |