tert-Butanol → HCID 10452425, compound

Participants

Reaction Conditions

Reaction Steps

To 0.5 g of ethyl 6,8-difluoro-1-methyl-7-(4-methyl-1-piperazinyl)-4-oxo-4H-[1,3]thiazeto[3,2-a]quinoline-3-carboxylate was added 10 ml of 5% solution of potassium hydroxide in 3:1 mixture of tert-butanol and water and stirred at 60° C. for 30 minutes. tert-Butanol was evaporated therefrom in vacuo, the residue was neutralized with acetic acid, extracted with a 3:1 mixture of chloroform and methanol, the extract was washed with saturated sodium chloride solution, dried over magnesium sulfate, the solvent was evaporated therefrom, and the residue was subjected to a silica gel column chromatography (30 g of Wakogel C-300 being used) and eluted with chloroform-methanol (10:1) to give 0.18 g of desired product, m.p. 238° C. (decompn.).

Provenance & Evidence