Trifluoroacetic acid → N-(5-(3-(4-amino-6-methyl-1,3,5-triazin-2-yl)-5-((4-(methylsulfonyl)piperazin-1-yl)methyl)pyridin-2-ylamino)pyridin-2-yl)acetamide

Participants

Reaction Steps

N-(5-(3-(4-(bis(4-Methoxybenzyl)amino)-6-methyl-1,3,5-triazin-2-yl)-5-((4-(methylsulfonyl)piperazin-1-yl)methyl)pyridin-2-ylamino)pyridin-2-yl)acetamide (0.0806 g, 0.107 mmol) and trifluoromethanesulfonic acid (0.02 mL, 0.2 mmol) were dissolved into TFA (2 mL). The pale yellow solution was stirred at rt for 30 min. Then the mixture was stirred at 65° C. for overnight. After cooling to rt, solid sodium carbonate was added followed by aq sodium bicarbonate. The resulting greenish solid was collected and the crude product was purified by preparative HPLC using Phenomenex, Gemni 5 micron C18 100×30 mm column (1%-90% CH3CN w/0.1% TFA/H2O w/0.1% TFA in 10 min). The fractions containing product were collected and concentrated to dryness in vacuo. The yellow residue was taken up in aq. sat'd sodium bicarbonate and sonicated. The resulting yellow solid was collected and washed with water and dried in a vacuum oven overnight to give N-(5-(3-(4-amino-6-methyl-1,3,5-triazin-2-yl)-5-((4-(methylsulfonyl)piperazin-1-yl)methyl)pyridin-2-ylamino)pyridin-2-yl)acetamide (0.0361 g, 66% yield). 1H NMR (400 MHz, d6-DMSO) δ 11.90 (s, 1H); 10.35 (s, 1H); 8.74 (d, J=2.54 Hz, 1H); 8.71 (d, J=2.54 Hz, 1H); 8.21-8.28 (m, 2H); 8.02 (d, J=9.00 Hz, 1H); 7.89 (br. s., 1H); 7.74 (br. s., 1H); 3.49 (s, 2H); 3.10 (d, J=4.50 Hz, 4H); 2.86 (s, 3H); 2.44 (s, 3H); 2.07 (s, 3H). 4 protons on the piperazine were buried under the water peak and could not be integrated. m/z (ESI, +ve ion) 513.0 (M+H)+.

Provenance & Evidence