Iodoethane → 2-(6-chloro-1-ethyl-1H-indazol-3-yl)-N-isopropyl-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide

Participants

Reaction Conditions

Reaction Steps

2-(6-Chloro-1H-indazol-3-yl)-N-isopropyl-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (120 mg, 247 μmol) was dissolved in DMF (1 mL) and cooled to 0° C. Sodium hydride (12.9 mg, 322 μmol) was added and the mixture was allowed to stir for 30 min at 0° C. Ethyl iodide (57.9 mg, 30.0 μL, 371 μmol) was added and the mixture was warmed to 20° C. After 15 h the mixture was diluted with water and extracted with ethyl acetate. The organic extracts were washed with brine, dried over anhydrous sodium sulfate and concentrated in vacuo. The residue was purified by chromatography (silica, 40 g Analogix pre-packed column, 20-50% ethyl acetate in hexanes, 15 minute gradient) to give 2-(6-chloro-1-ethyl-1H-indazol-3-yl)-N-isopropyl-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (78 mg, 152 μmol, 61%) as a yellow powder. MS (M+Na)+=535; 1H NMR (CDCl3) δ: 9.26 (s, 1H), 8.44-8.49 (m, 1H), 8.39-8.42 (m, 1H), 8.20-8.28 (m, 1H), 7.47-7.56 (m, 1H), 7.23 (d, J=1.5 Hz, 1H), 5.67-5.77 (m, 2H), 4.43-4.59 (m, 1H), 4.13 (q, J=7.2 Hz, 1H), 3.52-3.67 (m, 1H), 1.57-1.65 (m, 4H), 1.42 (d, J=6.4 Hz, 4H), 0.88-1.01 (m, 2H)

Provenance & Evidence