Cesium carbonate → HCID 66851519, compound

Participants

Reaction Conditions

Reaction Steps

A suspension of N-(3-(5-chloro-2-methoxyphenyl)-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyrimidine-3-carboxamide (50.0 mg, 0.136 mmol, 1 equiv), tert-butyl 3-iodoazetidine-1-carboxylate (230.3 mg, 0.813 mmol, 6.00 equiv), and cesium carbonate (177 mg, 0.542 mmol, 4.00 equiv) in N,N-dimethylformamide (1 mL) was heated at 50° C. After 5 h, the reaction mixture was partitioned between saturated aqueous sodium chloride solution (5 mL) and ethyl acetate (5 mL). The aqueous layer was extracted with ethyl acetate (2×5 mL). The combined organic was dried over anhydrous sodium sulfate, filtered, and concentrated. The crude residue was dissolved in dichloromethane (2 mL) and trifluoroacetic acid (2 mL) at 24° C. After 5 h, the reaction mixture was concentrated in vacuo and purified by preparative HPLC to afford product (12.7 mg, 22% yield). 1H NMR (400 MHz, DMSO-d6), δ: 9.75 (s, 1H), 9.36 (m, 1H), 8.79 (m, 1H), 8.67 (s, 1H), 8.46 (s, 1H), 7.53-7.56 (m, 2H), 7.29-7.34 (m, 2H), 5.45 (m, 1H), 4.33 (m, 2H), 4.23 (m, 2H), 3.86 (s, 3H). LCMS (ESI): M+H=424.1.

Provenance & Evidence