Hydrochloric Acid → 5-methyl-4-(2-(tetrahydro-2H-pyran-4-yloxy)pyridin-3-ylamino)thieno[2,3-d]pyrimidine-6-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

Methyl 5-methyl-4-(2-(tetrahydro-2H-pyran-4-yloxy)pyridin-3-ylamino)thieno[2,3-d]pyrimidine-6-carboxylate (0.921 g, 2.30 mmol) was added into a solution of MeOH (8 mL) and 2M aqueous sodium hydroxide (2.0 mL). The reaction was stirred at 60° C. for two hours. The mixture was cooled to ambient temperature and acidified with concentrated hydrochloric acid. On addition of DCM a precipitate formed which was collected and washed with water. The product was purified by reverse phase preparative HPLC to yield off-white solid which was used in the next step without further purification.

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