Carbon Tetrachloride → HCID 10127912, compound

Participants

Reaction Conditions

Reaction Steps

N-Cyclopentyl-N-(4-{2-[2-(cyclopentylamino)-4-pyrimidinyl]pyrazolo[1,5-a]pyridin-3-yl}-2-pyrimidinyl)amine (140 mg, 0.32 mmol) was dissolved in anhydrous tetrahydrofuran (5 mL). The resulting solution was cooled to −78° C., then n-butyllithium (0.99 mL, 1.6 mmol, 1.6 M in hexane) was added dropwise. The resulting dark solution was stirred at −78° C. for 20 minutes, then carbon tetrachloride (2 mL) was added. The reaction was stirred for additional 20 minutes and then quenched by the addition of water and allowed to warm to room temperature. The phases were separated and the aqueous phase extracted with ethyl acetate. The organics were combined, dried over magnesium sulfate, filtered and concentrated. Purification by silica gel chromatography (1:1 ethyl acetate:hexane) gave 80 mg (53%) of N-(4-{7-chloro-2-[2-(cyclopentylamino)-4-pyrimidinyl]pyrazolo[1,5-a]pyridin-3-yl}-2-pyrimidinyl)-N-cyclopentylamine as a foam. 1H NMR (CDCl3): δ 8.37 (d, 1H), 8.27 (d, 1H), 8.16 (d, 1H), 7.26 (t, 1H), 7.06 (d, 1H), 7.04 (m, 1H), 6.62 (d, 1H), 5.21 (d, 1H), 5.15 (d, 1H), 4.32 (m, 1H), 4.10 (m, 1H), 1.4–2.1 (m, 16H); MS m/z 475 (M+1).

Provenance & Evidence