7,8-Difluoro-1-methyl-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine-3-carboxylic acid → HCID 19423673, compound

Participants

Reaction Steps

7-Fluoro-1-methyl-8-(3-methyl-3-methylamino-1-azetidinyl)-4-oxo-1,4-dihydrobenzo[b][1,8]-naphthyridine-3-carboxylic acid was prepared under the conditions of Example 15, but starting with 1.45 g of 7,8-difluoro-1-methyl-4-oxo-1,4-dihydrobenzo[b]-[1,8]naphthyridine-3-carboxylic acid and 2.34 g of 3-methyl-3-(methylamino)azetidine dimethanesulphonate. The reaction mixture is heated for 1 and a half hours to approximately 90° C. 1.12 g of 7-fluoro-1-methyl-8-(3-methyl-3-methylamino-1-azetidinyl)-1-methyl-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine-3-carboxylic acid are obtained in the form of a yellow solid, which decomposes at approximately 336° C.

Provenance & Evidence