Sodium Methoxide → (S)-2-(2-chloro-5-fluoropyrimidin-4-ylamino)-3,3-dimethylbutane-1-thiol

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Reaction Steps

To a nitrogen-purged solution of (S)—S-2-(2-chloro-5-fluoropyrimidin-4-ylamino)-3,3-dimethylbutyl ethanethioate, 76a, (1.00 g, 3.27 mmol) in methanol (20 mL) was added NaOMe (1.457 mL of 25% solution in MeOH, 6.540 mmol) and the solution was stirred at room temperature for 1 hour. The reaction mixture was concentrated in vacuo and the residue was dissolved in water (25 mL) and slowly acidified with 2N HCl to give a white precipitate that was extracted twice with EtOAc. The combined organic phases were dried (MgSO4), filtered and concentrated under reduced pressure to afford 0.85 g of the desired product as a pale beige color solid: LC/MS (10-90% ACN/water 5 min with 0.9% FA) m/z 264.92 (M+H) RT=3.32 min.

Provenance & Evidence