A glass microwave reaction vessel was charged with N-(1H-indazol-4-yl)-3-(2-methyl-6-(methylsulfinyl)pyrimidin-4-yl)quinoxalin-2-amine (36 mg, 0.087 mmol) in dioxane (2 mL), ammonia was bubbled in for 5 minutes. The reaction mixture was stirred and heated at 100° C. for 4 h. More NH3 was bubbled in and the mixture was heated for an additional 2 h. The mixture was cooled to room temperature and concentrated in vacuo. Prep TLC purification (5% MeOH in DCM as developed reagent) gave 3-(6-amino-2-methylpyrimidin-4-yl)-N-(1H-indazol-4-yl)quinoxalin-2-amine (10 mg, 0.027 mmol, 31.3% yield) as a yellow solid. 1H NMR (400 MHz, d6-DMSO) δ 13.22 (s, 2H); 8.52 (d, J=7.07 Hz, 1H); 8.31 (s, 1H); 7.95 (d, J=8.09 Hz, 1H); 7.82 (d, J=9.10 Hz, 1H); 7.72-7.80 (m, 1H); 7.64 (s, 1H); 7.55-7.62 (m, 1H); 7.34-7.46 (m, 2H); 7.26 (d, J=9.10 Hz, 1H); 2.70 (s, 3H). m/z (ESI, +ve ion) 369 (M+H)+.
