반응 #951532

반응 방정식

hydrochloric acid

7-(1-piperazinyl)-1-cyclopropyl-6-fluoro-5-methyl-1,4-dihydro-4-oxoquinoline-3-carboxylic acid

acetic anhydride

→

7-(4-acetyl-1-piperazinyl)-1-cyclopropyl-6-fluoro-5-methyl-1,4-dihydro-4-oxoquinoline-3-carboxylic acid

용매

sodium hydroxide

반응 조건

후처리

1. 1
   추출the resultant product is extracted with dichloromethane
2. 2
   건조the extract is dried over magnesium sulfate
3. 3
   농축After concentrating
4. 4
   기타the obtained residue is recrystallized from ethanol

실험 절차

To a solution of 7-(1-piperazinyl)-1-cyclopropyl-6-fluoro-5-methyl-1,4-dihydro-4-oxoquinoline-3-carboxylic acid (40 mg) in 5% sodium hydroxide (2 ml) is added acetic anhydride (0.1 ml) at room temperature. After the mixture is made acidic with dilute hydrochloric acid, the resultant product is extracted with dichloromethane and the extract is dried over magnesium sulfate. After concentrating, the obtained residue is recrystallized from ethanol to give 7-(4-acetyl-1-piperazinyl)-1-cyclopropyl-6-fluoro-5-methyl-1,4-dihydro-4-oxoquinoline-3-carboxylic acid (29 mg), as white powder, m.p. 261°-263° C.

출처