Ethanol → 4-chloro-2-fluorophenyl-1,4-dihydro-5H-tetrazol-5-one

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Reaction Steps

To a stirred solution of 0.12 g (0.0052 mole) of sodium in 16 ml of ethanol was added 1.2 g (0.0046 mole) of (1-(4-chloro-2-fluorophenyl)-1H-tetrazol-5-yl)ethyl sulfide. The resultant solution was heated at reflux for six hours. The reaction mixture was cooled and the solvent was evaporated under reduced pressure leaving a residue. This residue was dissolved in 40 ml of water and the aqueous solution was washed with diethyl ether. The aqueous phase was acidified with concentrated hydrochloric acid forming a precipitate. The precipitate was collected by filtration and dried to yield 0.55 g of 1-(4-chloro-2-fluorophenyl)-1,4-dihydro-5H-tetrazol-5-one as a solid, m.p. 194° C.

Provenance & Evidence