(S)-1-Cyclopropyl-7-[3-[[(1,1-dimethylethoxy)carbonyl]amino]-1-pyrrolidinyl]-6,8-difluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid, ethyl ester → (S)-7-[3-(Amino)-1-pyrrolidinyl]-1-cyclopropyl-6,8-difluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid, ethyl ester

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Reaction Steps

A solution of 23.9 g (50 mmol) of (S)-1-cyclopropyl-7-[3-[[(1,1-dimethylethoxy)carbonyl]amino]-1-pyrrolidinyl]-6,8-difluoro-1,4-dihydro-4-oxo-3-quinoline carboxylic acid, ethyl ester in 150 ml of trifluoroacetic acid was stirred at room temperature for four hours. The solvent was removed in vacuo and the residue was triturated with 5% sodium bicarbonate. The solid was removed by filtration, washed 5% sodium bicarbonate, water and dried in vacuo to give 17.8 g of the title compound, mp 227°-228°.

Provenance & Evidence