Ethyl 2-(2,2,2-trifluoroethyl)thiazole-4-carboxylate → 2-(2,2,2-Trifluoroethyl)-1,3-thiazole-4-carboxylic acid

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Reaction Conditions

Reaction Steps

A mixture of ethyl 2-(2,2,2-trifluoroethyl)thiazole-4-carboxylate (example 67, step c) (0.3 g) in concentrated hydrochloric acid (7 mL) and water (7 mL) was heated at 80° C. for 5 hours under nitrogen. The solvent was evaporated under a stream of nitrogen and the residue partitioned between ethyl acetate (40 mL) and brine (3 mL). The organic layer was dried over sodium sulphate, filtered and the solvent evaporated under reduced pressure to afford the subtitled compound. Yield 0.23 g.

Provenance & Evidence