1,1'-Carbonyldiimidazole → 5-fluoro-1,6-dimethyl-4-hydroxy-2-oxo-N-(4-methyl-2-thiazolyl)-1,2-dihydropyridine-3-carboxamide

Participants

Reaction Steps

200 mg of 5-fluoro-1,6-dimethyl-4-hydroxy-2-oxo-1,2-dihydropyridine-3-carboxylic acid was dissolved in 3 ml of acetonitrile, and 162 mg of carbonyldiimidazole was added to this. The mixture was stirred for 1 hour under heat refluxing condition, then, 114 mg of 2-amino-4-methylthiazole was added, and the resulting mixture was further stirred for 1 hour under heat refluxing condition. Thereafter, the reaction mixture was cooled to room temperature. As a result, a crystal was produced. The produced crystal was collected by filtration, to obtain 90 mg of 5-fluoro-1,6-dimethyl-4-hydroxy-2-oxo-N-(4-methyl-2-thiazol yl)-1,2-dihydropyridine-3-carboxamide (hereinafter, referred to as present compound 31) represented by the formula:

Provenance & Evidence