Trifluoroacetic acid → 2-(3-[2-(5-Ethyl-pyridin-2-yl)-vinyl]-1H-indazol-6-ylamino)-N-prop-2-ynyl-benzamide

Participants

Reaction Steps

To 2-{3-[2-(5-Ethyl-pyridin-2-yl)-vinyl]-1H-indazol-6-ylamino}-benzoic acid (49 mg, 0.105 mmol) was added 2 mL of a 90:10:1 mixture of CH2Cl2:TFA:TES. The reaction was stirred at reflux for 1 hour, and then diluted with toluene (20 mL). The solvent was removed by rotary evaporation to yield a thick oil. The oil was dissolved in DMF (1 mL) and to this solution was added TEA (0.072 mL, 0.52 mmol), propargyl amine (0.014 mL, 0.208 mmol), and HATU (59 mg, 0.156 mmol). The reaction was stirred for 3 hours, and then purified by preparatory HPLC to yield the desired product (29 mg, 66%). 1H NMR (CDCL3-d): δ 9.83 (1H, s), 8.63 (2H, s), 8.04 (2H, m), 7.68 (2H, s), 7.47 (1H, m), 7.32 (1H, d, J=1.51 Hz), 7.10 (1H, dd, J1=8.67 Hz, J2=1.88 Hz), 6.93 (1H, m), 6.07 (2H, dd, J1=5.09 Hz, J2=2.26 Hz), 3.15 (1H, t, J=2.35 Hz), 2.97 (2H, s), 2.74 (1H, s), 2.29 (1H, s), 1.27 (3H, t, J=7.44 Hz)

Provenance & Evidence