反应详情

8-(3-Amino-3-ethyl-1-azetidinyl)-7-fluoro-1-methyl-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine-3carboxylic acid was prepared under the conditions of Example 15, but starting with 1.66 g of 7,8-difluoro-1-methyl-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine-3-carboxylic acid and 3.1 g of 3-amino-3-ethylazetidine dimethane-sulphonate. 1.46 g of 8-(3-amino-3-ethyl-1-azetidinyl)-7-fluoro-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 294° C.

1. custom8-(3-Amino-3-ethyl-1-azetidinyl)-7-fluoro-1-methyl-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine-3carboxylic acid was prepared under the conditions of Example 15