Trifluoroacetic acid → HCID 59548292, compound

Participants

Reaction Conditions

Reaction Steps

4-(2-(5-Fluoro-6-methoxypyridin-3-ylamino)-5-(4-(methylsulfonyl)benzyl)pyridin-3-yl)-N,N-bis(4-methoxybenzyl)-6-methyl-1,3,5-triazin-2-amine (384.7 mg, 0.5228 mmol) was dissolved in trifluoroacetic acid (Aldrich redistilled 99+%, 5.0 mL, 65 mmol) and the reaction flask was fitted with a reflux condenser and placed in a preheated oil bath (75° C.) and stirred overnight. Then, the reaction was cooled to room temperature, concentrated, and treated with saturated sodium bicarbonate and 5 N NaOH and then with 5 N HCl to adjust the pH to 6. Then, DCM was added and the layers were separated. The aqueous phase was filtered, and the collected solid was combined with the organic phase. The aqueous phase was extracted with DCM, and these organic extracts were combined with the organic phase, concentrated, and purified on a silica gel column (30:1 DCM/2 N ammonia in MeOH to 10:1 DCM/2 N ammonia in MeOH). The solvent polarity was increased after most of the product had eluted. The fractions with product were collected, concentrated, treated with MeOH, and filtered. The solid was washed with MeOH, collected, and dried under high vacuum. The material was <95% pure by HPLC, so the solid was washed with EtOAc, filtered, collected, and dried under high vacuum in a water bath (40° C.) and then at room temperature overnight to give 4-(2-(5-fluoro-6-methoxypyridin-3-ylamino)-5-(4-(methylsulfonyl)benzyl)pyridin-3-yl)-6-methyl-1,3,5-triazin-2-amine (61.3 mg, 24% yield) as a yellow powder. 1H NMR (d6-DMSO, 400 MHz) δ 11.89 (s, 1H), 8.65 (d, J=2.15 Hz, 1H), 8.40 (d, J=2.15 Hz, 1H), 8.38-8.30 (m, 2H), 7.86 (d, J=8.22 Hz, 2H), 7.90-7.84 (m, 1H), 7.74 (br s, 1H), 7.53 (d, J=8.22 Hz, 2H), 4.09 (s, 2H), 3.93 (s, 3H), 3.17 (s, 3H), 2.41 (s, 3H). m/z (ESI, +ve ion) 496 (M+H)+.

Provenance & Evidence