HRID1084376

反应详情

EQUATION

反应方程式

HRID 1084376 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

1

PROCEDURE

实验过程

1-Cyclopropyl-7-fluoro-8-(3-methyl-1-piperazinyl)-4-oxo-1,4-dihydro-benzo[b][1,8]naphthyridine-3 -carboxylic acid is prepared under the conditions of Example 1 but starting from 1 g of 8-chloro-1-cyclopropyl-7-fluoro-4-oxo-1,4-dihydro-benzo[b][1,8]naphthyridine-3-carboxylic acid and 3 g of 2-methylpiperazine in 10 cm3 of pyridine. The pure product is obtained after a supplementary purification by recrystallization from 200 cm3 of dimethylformamide. 0.5 g of 1-cyclopropyl-7-fluoro-8-(3-methyl-1-piperazinyl)-4-oxo-1,4-dihydro-benzo[b][1,8]naphthyridine-3-carboxylic acid hemihydrate is obtained in the form of a yellow solid melting at 343° C.

WORKUP

后处理

  1. customThe pure product is obtained
  2. customafter a supplementary purification
  3. customby recrystallization from 200 cm3 of dimethylformamide