Trifluoroacetic acid → 5-{2-[3-(1-Hydroxyethyl)-phenylamino]-pyrimidin-4-yl}-thiophene-2-sulfonic acid dimethylamide

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5-(2-Methanesulfonyl-pyrimidin-4-yl)-thiophene-2-sulfonic acid dimethylamide (19.8 mg, 0.057 mmol), 1-(3-aminophenyl)ethanol (11.7 mg, 0.085 mmol) and trifluoroacetic acid (6.5 uL, 0.085 mmol) were combined in DMSO (0.5 M) and the mixture was heated in a capped vial at 100° C. for 16 hours. The dark solution was diluted with DMSO and purified by preparative LC. 5-{2-[3-(1-Hydroxyethyl)-phenylamino]-pyrimidin-4-yl}-thiophene-2-sulfonic acid dimethylamide (14.4 mg, 62.6%) was obtained as a brown solid after lyophilization. 1H NMR (500 MHz, DMSO-d6) δ 1.35 (d, J=6 Hz, 3H), 2.70 (s, 6H), 4.70 (m, 1H), 5.12 (d, J=4 Hz, 1H), 6.97 (br d, J=7 Hz, 1H), 7.24 (t, J=7.5 Hz, 1H), 7.46 (d, J=5.5 Hz, 1H), 7.49 (br d, J=6.5 Hz, 1H), 7.71 (d, J=4 Hz, 1H), 7.91 (br s, 1H), 8.12 (d, J=4 Hz, 1H), 8.58 (d, J=5.0 Hz, 1H), 9.75 (s, 1H). MS: m/z 405 (M+H+).

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