反应详情

In a sealed flask was combined 5-benzyl-6-chloro-2-iodopyridin-3-ol (1.50 g, 4.3 mmol), PdCl2(PPh3)2 (0.30 g, 0.43 mmol), copper(I) iodide (0.17 g, 0.87 mmol), N-ethyl-N-isopropylpropan-2-amine (6.1 mL, 35 mmol), methyl 1-(4-ethynyl-3-fluorobenzyl)azetidine-3-carboxylate (1.2 g, 4.8 mmol) and DMF (10 mL, 129 mmol). The flask was flushed with argon, sealed and placed in an oil bath for 16 h at 80° C. The reaction was concentrated to remove solvent, and the resulting black mixture was adsorbed onto silica. Flash chromatography (100% EtOAc) afforded a yellow oil that was further purified on a Varian HF Mega Bond Elut SCX column (eluted with 2M ammonia in MeOH). Trituration with of the resulting solids with ether afforded an off-white solid. 1H NMR (300 MHz, CHLOROFORM-d) δ ppm 7.83-7.90 (1H, m), 7.49 (1H, s), 7.27-7.40 (5H, m), 7.22-7.24 (1H, m), 7.12-7.19 (2H, m), 4.20 (2H, s), 3.72 (3H, s), 3.65 (2H, s), 3.52-3.59 (2H, m), 3.32-3.38 (3H, m); MS (ESI) m/z: Calculated: 464.1; Observed: 465.1 (M++1).

1. customIn a sealed flask was combined
2. customThe flask was flushed with argon
3. customsealed
4. concentrationThe reaction was concentrated
5. customto remove solvent
6. customFlash chromatography (100% EtOAc) afforded a yellow oil that
7. customwas further purified on a Varian HF Mega Bond Elut SCX column (eluted with 2M ammonia in MeOH)
8. customTrituration with of the resulting solids with ether afforded an off-white solid