反应详情

A slurry of 64 mg (0.157 mmol) of [9-benzyl-4-carbamoyl-8-methyl-1,2,3,4-tetrahydrocarbazol-5-yl]oxyacetic acid methyl ester in 2 ml of tetrahydrofuran and 7 ml of methanol was treated with 0.5 ml of an aqueous 2 N sodium hydroxide solution and stirred overnight at room temperature. The solvent was evaporated and the residue was partitioned between ethyl acetate and 1 N HCl solution. After another extraction with ethyl acetate, the extracts were washed with brine, dried over magnesium sulfate and concentrated to afford a quantitative yield (62 mg) of the title compound. ESIMS m/e 393 (M++1), 391 (M+−1). NMR (300 MHz, d6-DMSO): δ12.98 (br, 1H); 7.30-7.18 (m, 3H); 6.82 (d+br, J=7.0, 3H); 6.73 (br, 1H); 6.59 (d, J=7.9,1H); 6.26 (d, J=7.9, 1H); 5.53 and 5.45 (ABq, J=18.1, 2H); 4.62 (s, 2H); 3.96 (br, 1H); 2.63 (m, 1H); 2.43 (m, 1H); 2.34 (s, 3H); 2.04 (m, 2H); 1.78 (m, 2H).

1. customThe solvent was evaporated
2. customthe residue was partitioned between ethyl acetate and 1 N HCl solution
3. extractionAfter another extraction with ethyl acetate
4. washthe extracts were washed with brine
5. dry with materialdried over magnesium sulfate
6. concentrationconcentrated