Sodium Hydroxide → (S)-4-(7-(3-methoxy-5-(2-methylpyrrolidin-1-yl)phenylamino)thiazolo[5,4-d]pyrimidin-5-yl)benzoic acid

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Reaction Conditions

Reaction Steps

The mixture of (S)-methyl 4-(7-(3-methoxy-5-(2-methylpyrrolidin-1-yl)phenylamino)thiazolo[5,4-d]pyrimidin-5-yl)benzoate (121 mg, 0.25 mmol) and NaOH (102 mg, 2.54 mmol) in dioxane (20 mL) and H2O (10 mL) was heated to 30° C. for 2 h. The reaction mixture was concentrated and the aqueous residue was adjusted to pH˜4 by the addition of conc. HCl. The solution was extracted with ethyl acetate (10 mL×3), then combined organics dried over Na2SO4 and concentrated to afford (S)-4-(7-(3-methoxy-5-(2-methylpyrrolidin-1-yl)phenylamino)thiazolo[5,4-d]pyrimidin-5-yl)benzoic acid (50 mg, crude) as yellow solid which was used to next step without purification. LC-MS: 462 [M+H]+, tR=1.699 min.

Provenance & Evidence