7,8-Difluoro-1-methyl-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine-3-carboxylic acid → HCID 19423711, compound

Participants

Reaction Conditions

Reaction Steps

(RS)-8-(3-Amino-2,2-dimethyl-1-azetidinyl)-7-fluoro-1-methyl-4-oxo-1,4-dihydrobenzo[b][1,8]-naphthyridine-3-carboxylic acid was prepared under the conditions described in 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 2.33 g of 3-amino-2,2-dimethylazetidine dimethanesulphonate. The reaction mixture is heated with stirring to approximately 100° C. for 5 hours. 0.6 g of (RS)-8-(3-amino-2,2-dimethyl-1-azetidinyl)-7-fluoro-1-methyl-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine-3-carboxylic acid is obtained in the form of a yellow solid, which decomposes at 285° C.

Provenance & Evidence