反应详情

0.715 g of ethyl 1-cyclopropyl-6,7-difluoro-1,4-dihydro-8-(3-methyl-but-3-en-1-inyl)-4-oxo-3-quinolinecarboxylate is refluxed for 1.5 hours in a mixture of 10 ml of glacial acetic acid, 0.5 ml of water and 0.2 ml of concentrated sulphuric acid. The reaction mixture is poured into 100 ml of water. The solid which has precipitated is filtered off with suction, washed with water and dried. 0.53 g of 1-cyclopropyl-6,7-difluoro-1,4-dihydro-8-(3-methyl-but-3-en-1-inyl)-4-oxo-3-quinolinecarboxylic acid is obtained (80% of theory).

1. customThe solid which has precipitated
2. filtrationis filtered off with suction
3. washwashed with water
4. customdried