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

Participants

Reaction Conditions

Reaction Steps

In a 25 mL round-bottomed flask, 2-bromo-N-isopropyl-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (107 mg, 258 μmol) and 1-methyl-3-(tributylstannyl)-5-(trifluoromethoxy)-1H-indazole (209 mg, 413 μmol) were dissolved in DMF (2.5 mL) under argon, tetrakis(triphenylphosphine)palladium (0) (14.9 mg, 12.9 μmol) and CuI (9.83 mg, 51.6 μmol, Eq: 0.20) were added and the mixture sonicated for 5 min with bubbling argon. The reaction mixture was stirred at 90° C. (oil bath temperature) for 2.5 h. The reaction mixture was concentrated under high vacuum and the residue was purified by chromatography (40 g column, 50 μm from Analogix, 0-50% EtOAc in hexanes over 30 min) to give N-isopropyl-2-(1-methyl-5-(trifluoromethoxy)-1H-indazol-3-yl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (113 mg, 206 μmol, 80%) as a light yellow solid. MS (M+H)+=549; 1H NMR (CDCl3) δ: 9.23 (s, 1H), 8.35 (s, 2H), 8.01 (d, J=7.9 Hz, 1H), 7.44-7.53 (m, 1H), 7.34-7.43 (m, 1H), 5.70 (s, 2H), 4.38-4.56 (m, 1H), 4.19 (s, 3H), 3.52-3.64 (m, 2H), 1.42 (d, J=6.4 Hz, 6H), 0.84-1.00 (m, 2H), −0.05 (s, 9H).

Provenance & Evidence