Dichloromethane → tert-butyl 5-cyclopropyl-3-(5-iodo-2-phenylpyrimidin-4-ylamino)-1H-pyrazole-1-carboxylate

Participants

Reaction Steps

To the solution of N-(5-cyclopropyl-1H-pyrazol-3-yl)-5-iodo-2-phenylpyrimidin-4-amine (0.4 g, 0.99 mmol, 1.0 eq) in dry THF (50 mL), NaH (0.4 g, 60% dispersion in oil, 10.0 mmol, 10.0 eq) was added by portions. The reaction mixture was stirred at rt for 1 h. Then, BOC2O (0.26 mL, 1.19 mmol, 1.2 eq) was added to the reaction mixture and the resulting reaction was stirred at rt for 2 h. CH2Cl2 was added and organic layer was washed (water), dried and concentrated. The residue was purified by silica gel chromatography (hexane as eluant) to afford tert-butyl 5-cyclopropyl-3-(5-iodo-2-phenylpyrimidin-4-ylamino)-1H-pyrazole-1-carboxylate (0.32 g, 60.3%). LC-MS (m/z): 504.1 [M+H]+. 1H NMR (400 MHz, CDCl3): δ 0.81-0.85 (m, H), 1.09-1.15 (m, 2H), 1.67 (s, 1H), 2.49 (m, 1H), 6.86 (s, 2H), 7.50-7.60 (m, 3H), 8.41-8.44 (m, 2H), 9.40 (s, 1H), 10.46 (s, 2H).

Provenance & Evidence