Potassium Carbonate → Tert-butyl 4-(4-ethynyl-1,3-thiazol-2-yl)piperidine-1-carboxylate

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Reaction Steps

Under argon, tert-butyl 4-(4-formyl-1,3-thiazol-2-yl)piperidine-1-carboxylate (600 mg) was dissolved in methanol, and potassium carbonate (839 mg) and dimethyl 1-diazo-2-oxopropylphos-phonate (786 mg) were added. The mixture was stirred at room temperature for 3 hours. After aqueous work-up, the mixture was extracted with ethyl acetate, the extracts were dried with sodium sulphate and the solvent was concentrated under reduced pressure. The residue was purified chromatographically. This gave tert-butyl 4-(4-ethynyl-1,3-thiazol-2-yl)piperidine-1-carboxylate (493 mg).

Provenance & Evidence