Diisopropylethylamine → 3-(5-amino-4-(3-iodobenzoyl)-1H-pyrazol-1-yl)-N-cyclopropyl-4-methylbenzamide

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Reaction Conditions

Reaction Steps

To a stirred solution of N-cyclopropyl-3-hydrazino-4-methyl-benzamide, trifluoroacetic acid salt 6 (648 mg, 1.74 mmol, 1.0 eq) in 2 mL of ethanol was added 2-(3-iodo-benzoyl)-3-phenylamino-acrylonitrile 2 (550 mg, 1.74 mmol, preparation: International Patent Application Publication No. WO 02/57101 A1, pg. 84) and DIEA (0.50 mL, 2.9 mmol). The mixture was heated to 160° C. for 40 min using microwave. The mixture was concentrated in vacuo. The crude product was purified by silica gel column chromatography (EtOAc/hex, gradient 1/1 to 2/1) to give 3-[5-Amino-4-(3-iodo-benzoyl)-pyrazol-1-yl]-N-cyclopropyl-4-methyl-benzamide 7 (589 mg, 70%) as a white solid. MS m/z 497 [M+H]+; 1H NMR (300 MHz, CDCl3) δ0.60 (m, 2H), 0.86 (m, 2H), 2.24 (s, 3H), 2.87 (m, 1H), 5.81 (bs, 2H), 6.35 (bs, 1H), 7.25 (dd, J1=J2=7.8 Hz, 1H), 7.45 (d, J=8.1 Hz, 1H), 7.69 (d, J=1.7 Hz, 1H), 7.80 (m, 3H), 7.89 (m, 1H), 8.00 (s, 1H) ppm.

Provenance & Evidence