Trifluoroacetic acid → HCID 90220400, compound

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Reaction Steps

To a suspension of {1-[4-carbamoyl-5-(pyridin-2-ylamino)-thiazol-2-yl]-piperidin-3-yl}-carbamic acid tert-butyl ester (prepared as described in example 1) (359 mg, 0.86 mmol) in dichloromethane (10 mL) was added trifluoroacetic acid (10 mL, 130 mmol) to form a yellow solution. The mixture was stirred at ambient temperature for 30 minutes then evaporated to dryness in vacuo. The residue was taken up in dichloromethane (25 mL) and washed with saturated aqueous sodium hydrogen carbonate (100 mL). The organic layer was separated and the aqueous layer extracted with dichloromethane (5×20 mL) until no further yellow color was extracted in to the organic layer. The combined organic extracts were dried over sodium sulfate, filtered and concentrated in vacuo to give 2-((R)-3-amino-piperidin-1-yl)-5-(pyridin-2-ylamino)-thiazole-4-carboxylic acid amide as a yellow solid (280 mg).

Provenance & Evidence