Acetic Acid → HCID 58529543, compound

Participants

Reaction Steps

(5-(2-benzyl-2H-indazol-6-yl)-7-pyrrolidin-3-ylpyrrolo[2,1-f][1,2,4]triazin-4-amine (100 mg, 0.244 mmol) was dissolved in methanol (3.5 mL). Acetic acid (140 uL, 2.44 mmol) was added followed by a small scoop of activated molecular sieves. [(1-ethoxycyclopropyl)oxy](trimethyl)silane (255 mg, 1.47 mmol) was added to the flask via syringe. Solid sodium cyanoborohydride was added (61 mg, 0.977 mmol) to the reaction which was then heated under nitrogen overnight. The mixture was partitioned between ethyl acetate (100 mL) and sodium bicarbonate (50 mL). The aqueous layer was extracted with ethyl acetate (20 mL). The combined organic layer was washed with brine and then dried with sodium sulfate. The product was purified using column chromatography, eluent 2-3% (7N NH3 in Methanol)/dichloromethane to afford 32 mg (29%) of desired product. 1H NMR (300 MHz, dichloromethane-d2) δ 8.04 (s, 1 H), 7.89 (s, 1 H), 7.78-7.73 (m, 3 H), 7.60-7.40 (m, 4 H), 7.25 (d, 1 H), 6.63 (s, 1H), 5.62 (s, 2 H), 5.52 (bs, 2 H), 3.90 (m, 1H), 3.40 (m, 1H), 2.80 (m, 3 H), 2.40 (m, 1 H), 1.95 (m, 1 H), 1.75 (m, 1 H), 1.40-0.90 (m, 3 H); ES-MS m/z 450.2 [M+H]+, HPLC RT (min) 2.17.

Provenance & Evidence