反应详情

(RS)-3-Ethoxycarbonyl-7,9-difluoro-1-methyl-4-oxo-8-[3-(2-thienyl)-1-piperazinyl]1,4-dihydrobenzo[b][1,8]naphthyridine was prepared under the conditions of Example 39, but starting with 3-ethoxycarbonyl-7,8,9-trifluoro-1-methyl-4-oxo-1,4-dihydrobenzo [b][1,8]naphthyridine (1.68 g) and (RS)-2-(2-thienyl)piperazine (1.01 g). (RS)-3-Ethoxycarbonyl-7,9-difluoro-1-methyl-4-oxo-8-[3-(2-thienyl)-1-piperazinyl]-1,4-dihydrobenzo[b][1,8]naphthyridine (1.68 g) is thereby obtained in the form of a yellow solid, m.p. 220° C.

1. custom(RS)-3-Ethoxycarbonyl-7,9-difluoro-1-methyl-4-oxo-8-[3-(2-thienyl)-1-piperazinyl]1,4-dihydrobenzo[b][1,8]naphthyridine was prepared under the conditions of Example 39