反应详情

To a stirred solution of 2-[5-(toluene-4-sulfonyl)-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazol-4-yl]-pyridine (0.15 g, 0.35 mmol) in dry THF (10 mL) was added 2.5 M n-BuLi solution in hexane (0.21 mL, 0.525 mmol) under N2 at −78° C. After 20 minutes at this temperature, a solution of N-4-chlorobenzylindole-3-carboxaldehyde (0.1 g, 0.37 mmol) in dry THF (3 mL) was then added through a cannula. Stirring was continued at this temperature for 1 hour. The reaction was then quenched with H2O (10 mL) at 0° C. The aqueous solution was extracted with dichloromethane (3×15 mL). Combined dichloromethane solution was washed with brine and dried over Na2SO4. After removal of the solvent under reduced pressure, the crude material was separated by silica gel chromatography (2:1 hexane/ethyl acetate to 2:1 ethyl acetate/hexane) to afford the desired intermediate [1-(4-chloro-benzyl)-1H-indol-3-yl]-[4-pyridin-2-yl-5-(toluene-4-sulfonyl)-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazol-2-yl]-methanol as an oil (65 mg, 30%). 1H NMR (CDCl3) δ −0.05 (s, 9H), 0.70 (t, 2h, J=6), 2.55 (s, 3H), 3.2–3.35 (m, 2H), 4.02 (d, 1H, J=7), 5.2–5.4 (m, 2H), 5.41 (s,2H), 6.4 (d, 1H), 7.0–8.0 (m, 16 H), 8.8 (d, 1H J=5). ESMS calcd for (C37H39ClN4O4SSi): 698.6; found: 699.6 (M+H)+.

1. waitwas continued at this temperature for 1 hour
2. customThe reaction was then quenched with H2O (10 mL) at 0° C
3. extractionThe aqueous solution was extracted with dichloromethane (3×15 mL)
4. washCombined dichloromethane solution was washed with brine
5. dry with materialdried over Na2SO4
6. customAfter removal of the solvent under reduced pressure
7. customthe crude material was separated by silica gel chromatography (2:1 hexane/ethyl acetate to 2:1 ethyl acetate/hexane)