Diisopropylethylamine → (R)-tert-butyl 3-(5-(2-(2-chloro-5-fluorophenyl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyrimidin-3-ylcarbamoyl)azetidine-1-carboxylate

Participants

Reaction Steps

To a mixture of (R)-5-(2-(2-chloro-5-fluorophenyl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyrimidin-3-amine (Example 8, Step A; 20 mg, 0.06 mmol), 1-(tert-butoxycarbonyl)azetidine-3-carboxylic acid (15 mg, 0.072 mmol), and HATU (28 mg, 0.072 mmol) was added 0.6 mL acetonitrile to make a solution. After cooling in an ice bath for 10 minutes, DIEA (0.032 mL, 0.18 mmol) was added to the reaction drop-wise. The reaction was allowed to warm up to ambient temperature and stirred overnight. The reaction mixture was directly purified by reverse-phase column chromatography, eluting with 5 to 70% acetonitrile/water to yield the final product as an off-white solid (19 mg, 61% yield). MS (apci) m/z=515.0 (M+H).

Provenance & Evidence