5-Amino-2-fluoropyridine → HCID 86723663, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 6-fluoropyridin-3-amine (4.64 mg, 4.14 mmol) in dry THF (5 mL) was added 2 M solution of isopropylmagnesium chloride (1.98 mL, 3.96 mmol) in THF dropwise under nitrogen at 0° C. The resultant mixture was stirred at 0° C. for 20 min. To this solution was added a solution of (2S,4R)-methyl 4-hydroxy-1-(4-(5-isopropyl-1H-pyrazol-3-ylamino)-6,7-dihydro-5H-cyclopenta[d]pyrimidin-2-yl)pyrrolidine-2-carboxylate (400 mg, 1.04 mmol) in THF (2 mL) dropwise at 0° C. and the reaction mixture was allowed to stir at 25° C. for 4 h. The reaction was quenched with saturated ammonium chloride solution (10 mL) and diluted with water (25 mL). The product was extracted with EtOAc (2×50 mL). The combined organic layer was washed with water (2×100 mL) followed by brine (100 mL) and dried over anhydrous sodium sulfate. Removal of EtOAc under reduced pressure gave an oily residue which was purified by reverse phase HPLC to afford 66 mg of (2S,4R)—N-(6-fluoropyridin-3-yl)-4-hydroxy-1-(4-(5-isopropyl-1H-pyrazol-3-ylamino)-6,7-dihydro-5H-cyclopenta[d]pyrimidin-2-yl)pyrrolidine-2-carboxamide. 1H NMR (400 MHz, CDCl3, freebase) δ (ppm): 0.99-1.30 (m, 6H), 2.10-2.30 (m, 4H), 2.65-2.74 (m, 2H), 2.78-2.98 (m, 4H), 3.78-3.05 (m, 1H), 3.91-3.99 (m, 1H), 4.70-4.78 (m, 1H), 4.92-4.98 (m, 1H), 6.34 (s, 1H), 6.77 (s, 1H), 6.82 (dd, 1H), 7.93 (s, 1H), 8.08-8.18 (m, 1H). The other diasteromers are prepared using appropriate chiral starting materials.

Provenance & Evidence