3-ethoxycarbonyl-1-methyl-4-oxo-7,8,9-trifluoro-1,4-dihydro-benzo[b][1,8]naphthyridine 、
2-呋喃-2-基-哌嗪 在
(RS)-3-Ethoxycarbonyl-7,9-difluoro-8-[3-(2-furyl)-1-piperazinyl]-1-methyl-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine 、
乙醇 作用下,
40.0 ℃
、2.67 MPa
条件下,
以(RS)-3-Ethoxycarbonyl-7,9-difluoro-8-[3-(2-furyl)-1-piperazinyl]-1-methyl-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine (1.72 g) is obtained in the form of a yellow solid, m.p. 208°-210° C.的产率得到(RS)-3-Ethoxycarbonyl-7,9-difluoro-8-[3-(2-furyl)-1-piperazinyl]-1-methyl-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine