反应详情

温度

75 °C

To a solution of (2R,3S,5R)-5-(6-bromo-9H-purin-9-yl)-2-({[tert-butyl(dimethyl)silyl]oxy}methyl)tetrahydrofuran-3-yl acetate (1.26 g, 2.67 mmol), CuI (0.102 g, 0.534 mmol), and Pd(PPh3)2Cl2 (0.187 g, 0.267 mmol) in DMF was added DIPEA (0.930 mL, 5.34 mmol) and phenylacetylene (1.17 mL, 10.69 mmol). The mixture was stirred at 75° C. for 1 hour then concentrated. The residue was dissolved in CH2Cl2 (70 mL) and washed with saturated aq EDTA.Na2 (3×50 mL). The combined organics were dried (Na2SO4) and concentrated. The dark crude oil was purified by flash chromatography (40% EtOAc/hexanes) to afford the title compound (1.2 g, 91%).

1. concentrationthen concentrated
2. dissolutionThe residue was dissolved in CH2Cl2 (70 mL)
3. washwashed with saturated aq EDTA
4. dry with materialThe combined organics were dried (Na2SO4)
5. concentrationconcentrated
6. customThe dark crude oil was purified by flash chromatography (40% EtOAc/hexanes)