Hydrochloric Acid → 2-Thiazolemethanol, α-(trifluoromethyl)-

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Reaction Steps

A solution of 2 g (17.68 mmol) of thiazole-2-carboxaldehyde and 0.88 ml (0.88 mmol) of a 1M solution of tetrabutylammonium fluoride in THF, in 88 ml of THF, is admixed slowly at approximately 0° (ice bath) with 2.7 g (19.44 mmol) of trifluoromethyltrimethylsilane (TMS-CF3). Stirring is continued at ambient temperature for 2 hours. The reaction mixture is admixed with 25 ml of 1N aqueous hydrochloric acid and ethyl acetate. The aqueous phase is separated off and extracted twice with ethyl acetate, and the combined organic phases are washed successively with saturated aqueous sodium bicarbonate solution and than with saturated aqueous sodium chloride solution and are dried over sodium sulphate. Following evaporation of the solvent, the residue obtained is purified by chromatography on silica gel, eluting with a 98/2 mixture of dichloromethane and methanol.

Provenance & Evidence