Cesium carbonate → HCID 71280909, compound

Participants

Reaction Conditions

Reaction Steps

In a 2-5 mL Biotage microwave vial were mixed N-tert-butyl-2-(5-(difluoromethoxy)-1H-indazol-3-yl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (50 mg, 94.2 μmol), 1-(3-chloropropyl)azetidin-3-ol (42.3 mg, 283 μmol, Eq: 3.0) and Cs2CO3 (123 mg, 377 μmol) in DMF (2 mL). The mixture was stirred ˜10 min at 25° C. then heated to 100° C. in the Biotage microwave reactor for 30 min. LCMS showed complete reaction, diluted with 10 mL of dichloromethane and filtered through a celite pad, filtrate concentrated under high vacuum at 65° C. and residue dissolved in dichloromethane and purified by chromatography (spherical silica 20-45 μm, 23 g, Versaflash Supelco) eluting with 0 to 5% over 20 min (MeOH containing 10% ammonium hydroxide)/dichloromethane to give N-tert-butyl-2-(5-(difluoromethoxy)-1-(3-(3-hydroxyazetidin-1-yl)propyl)-1H-indazol-3-yl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (40 mg, 62.1 μmol, 65.9%) as a light yellow semisolid. MS (M+H)+=644; 1H NMR (CDCl3) δ: 9.23 (s, 1H), 8.36 (s, 1H), 8.30 (d, J=2.3 Hz, 1H), 8.08 (s, 1H), 7.58 (d, J=9.1 Hz, 1H), 7.35 (dd, J=8.9, 2.1 Hz, 1H), 6.55 (t, J=74.8 Hz, 1H), 5.75 (s, 2H), 4.43-4.63 (m, 3H), 3.66-3.76 (m, 2H), 3.55-3.65 (m, 2H), 2.88-2.99 (m, 2H), 2.51-2.61 (m, 2H), 2.03-2.17 (m, 3H), 1.65 (s, 9H), 0.92-1.02 (m, 2H), 0.00 (s, 9H).

Provenance & Evidence