反应详情

温度

160 °C

A mixture of methyl 3-hydroxy-5-[(1-methylethyl)oxy]benzoate (0.84 g, 4 mmol), 2-(azetidin-1-ylcarbonyl)-5-bromopyridine (1.16 g, 4.8 mmol), cesium carbonate (3.92 g, 1.2 mmol) and bromotris(triphenylphosphine)copper(I) (744 mg, 0.8 mmol) in DMA (20 mL) was stirred in a microwave reactor at 160° C. for 6 hours. The mixture was diluted with water (100 mL), washed with ethyl acetate (2×20 mL) and the aqueous layer filtered then acidified with 2N hydrochloric acid. The acidic layer was extracted with ethyl acetate (3×50 mL), the combined organics washed with water (2×20 mL), brine (20 mL), dried (MgSO4), and the solvent removed in vacuo. The residue was triturated with ether to give the desired compound as a white solid (1.06 g). 1H NMR δ (d6-DMSO): 1.28 (d, 6H), 2.28 (quin, 2H), 4.08 (t, 2H), 4.59 (t, 2H), 4.69 (quin, 1H), 6.98 (t, 1H), 7.10 (s, 1H), 7.28 (s, 1H), 7.56 (d, 1H), 7.99 (d, 1H), 8.41 (s, 1H); m/z 357 (M+H)+

1. washwashed with ethyl acetate (2×20 mL)
2. filtrationthe aqueous layer filtered
3. extractionThe acidic layer was extracted with ethyl acetate (3×50 mL)
4. washthe combined organics washed with water (2×20 mL), brine (20 mL)
5. dry with materialdried (MgSO4)
6. customthe solvent removed in vacuo
7. customThe residue was triturated with ether