Dimethylamine, hydrochloride → (R)-1-(4-(5-isopropyl-1H-pyrazol-3-ylamino)-6,7-dihydro-5H-cyclopenta[d]pyrimidin-2-yl)-N,N-dimethylpyrrolidine-2-carboxamide

Participants

Reaction Steps

To a solution of 1-(4-(5-isopropyl-1H-pyrazol-3-ylamino)-6,7-dihydro-5H-cyclopenta[d]pyrimidin-2-yl)pyrrolidine-2-carboxylic acid (300 mg, 0.842 mmol) in DMF (5 mL) was added dimethyl amine hydrochloride (343 mg, 4.213 mmol), HATU (320 mg, 0.842 mmol), diisopropylethylamine (163 mg, 1.263 mmol) and the reaction mixture was stirred at RT for 16 h. The progress of reaction was monitored by LCMS. The reaction mixture was diluted with water (20 mL) and extracted with EtOAc (3×30 mL). The organic layer was washed with water (8×40 mL) and dried over anhydrous sodium sulfate. Removal of solvent under reduced pressure gave a crude product which was purified by reverse phase HPLC followed by chiral HPLC to afford (R)-1-(4-(5-isopropyl-1H-pyrazol-3-ylamino)-6,7-dihydro-5H-cyclopenta[d]pyrimidin-2-yl)-N,N-dimethylpyrrolidine-2-carboxamide, and its (S) enantiomer. 1H NMR (400 MHz, CD3OD, freebase) δ (ppm): 1.28 (d, 6H), 1.90-2.18 (m, 5H), 2.30-2.42 (m, 1H), 2.62-3.08 (m, 4H), 2.76 (s, 3H), 2.82-2.30 (m, 1H), 2.98 (s, 3H), 3.61-3.91 (m, 2H), 5.01 (d, 1H), 6.00 (brs, 1H).

Provenance & Evidence