1-Cyclopropyl-7,8-difluoro-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine-3-carboxylic acid → 8-(3-Amino-3-methyl-1-azetidinyl)-1-cyclopropyl-7-fluoro-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine-3-carboxylic acid

Participants

Reaction Steps

8-(3-Amino-3-methyl-1-azetidinyl)-1-cyclopropyl-7-fluoro-4-oxo-1,4-dihydrobenzo[b][1,8]-naphthyridine-3-carboxylic acid was prepared under the conditions described in Example 16, but starting with 1.58 g of 1-cyclopropyl-7,8-difluoro-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine-3-carboxylic acid and 2.22 g of 3-amino-3-methylazetidine dimethanesulphonate. 1.7 g of 8-(3-amino-3-methyl-1-azetidinyl)-1-cyclopropyl-7-fluoro-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine-3-carboxylic acid are obtained in the form of a yellow solid, which decomposes at 298° C.

Provenance & Evidence