反应详情

To a mixture of 3-[5-(benzyloxy)-2-hydroxyphenyl]-1-[(5-chlorothiophen-2-yl)methyl]-1,3-dihydro-2H-indol-2-one (2.80 g, 6.07 mmol), para-formaldehyde (0.73 g, 24.3 mmol) in tetrahydrofuran (10.0 mL) was added an aqueous solution of sodium hydroxide (0.97 g, 24.3 mmol) in water (10.0 mL) at 0° C. The reaction solution was stirred for 2 h, then quenched by the addition of 10% aqueous hydrochloric acid solution (30.0 mL). The reaction mixture was extracted with ethyl acetate (3×50 mL). The combined organic solution was washed with saturated ammonium chloride (3×50 mL), brine (50.0 mL), dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated in vacuo to dryness. The residue was triturated with diethyl ether, filtered and dried to afford 3-[5-(benzyloxy)-2-hydroxyphenyl]-1-[(5-chlorothiphen-2-yl)methyl]3-(hydroxymethyl)-1,3-dihydro-2H-indol-2-one (2.71 g, 91%) as a colourless solid: MS (ES+) m/z 494.2 (M+1), 492.3 (M+1).

1. customquenched by the addition of 10% aqueous hydrochloric acid solution (30.0 mL)
2. extractionThe reaction mixture was extracted with ethyl acetate (3×50 mL)
3. washThe combined organic solution was washed with saturated ammonium chloride (3×50 mL), brine (50.0 mL)
4. dry with materialdried over anhydrous sodium sulfate
5. filtrationfiltered
6. concentrationThe filtrate was concentrated in vacuo to dryness
7. customThe residue was triturated with diethyl ether
8. filtrationfiltered
9. customdried