反应详情

A mixture comprising 7-(3-t-butoxycarbonylamino-4-methyl-1-pyrrolidinyl)-1-cyclopropyl-6-fluoro-5-methyl-1,4-dihydro-4-oxoquinoline-3-carboxylic acid (trans form) (120 mg), ethanol (4 ml) and 10% hydrochloric acid (4 ml) is refluxed for 30 minutes. After concentrating, the obtained residue is recrystallized from methanol-ethyl acetate to give 7-(3-amino-4-methyl-1-pyrrolidinyl)-1-cyclopropyl-6-fluoro-5-methyl-1,4-dihydro-4-oxoquinoline-3-carboxylic acid hydrochloride (trans form) (60 mg), as white powder, m.p. 272°-275° C.

1. concentrationAfter concentrating
2. customthe obtained residue is recrystallized from methanol-ethyl acetate