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199599-68-3

4-Thiazolecarboxaldehyde, 2-[(dimethylamino)methyl]- synthesis

3synthesis methods
-

Yield:-

Reaction Conditions:

with potassium carbonate in ethanol;

Steps:

27 2-Dimethylaminomethylthiazole-4-carboxaldehyde

Preparation 27 2-Dimethylaminomethylthiazole-4-carboxaldehyde To a slurry of 2-dimethylaminothioacetamide hydrochloride (7.7 g, 50 mmol) in ethanol (100 mL) was added ethyl bromopyruvate (6.3 mL). The mixture was refluxed 6 hours and then cooled to room temperature. More ethyl bromopyruvate (3.2 mL for a total of 75 mmol) was added and the reaction was refluxed 2.5 hours more. The mixture was cooled to ambient temperature and concentrated at reduced pressure. The residue was partitioned between water and ethyl acetate and brought to pH 10 with addition of solid potassium carbonate. The phases were separated and the aqueous layer was extracted with ethyl acetate. The combined organic phase was washed with water and brine, then it was dried over sodium sulfate and concentrated to afford an amber oil. This oil was purified by flash chromatography on silica gel (120 g).

References:

EP807633,1997,A2 US5962457,1999,A