Water → Ethyl 6-(2,3-dichlorobenzyl)-1,4-dihydro-8-fluoro-1-(2-hydroxyethyl)-4-oxo-3-quinolinecarboxylate

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Reaction Steps

Ethyl 6-(2,3-dichlorobenzyl)-1,4-dihydro-8-fluoro-1-[2-(tert-butyldimethylsilyloxy)ethyl]-4-oxo-3-quinolinecarboxylate (350 mg, 0.63 mmol) obtained in Step 5 was dissolved in THF (25 ml) and tetrabutylammonium fluoride (1M THF solution; 1.9 ml, 1.9 mmol) was added. The mixture was stirred at room temperature for 1 hr. Water was added to the reaction solution and the precipitate was collected by filtration, washed with water and vacuum-dried to give an object product (279 mg, yield quant) as a pale-yellow solid.

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