反应详情

(2R,6S,13aS,14aR,16aS,Z)-ethyl 6-(tert-butoxycarbonylamino)-2-(4-fluoroisoindoline-2-carbonyloxy)-9-(2-nitrophenylsulfonyl)-5,16-dioxo-1,2,3,5,6,7,8,9,10,11,13a,14,14a,15,16,16a-hexadecahydrocyclopropa(n)pyrrolo[2,1-c][1,4,9]triazacyclopentadecine-14a-carboxylate (1.45 g, 1.72 mmol) in THF (22 mL) was added 0.4 N NaOH solution (10.8 ml, 4.30 mmol) in water. The reaction was stirred at rt for 6 days. Water (5 mL) and ether (15 mL) was added. The aqueous layer was separated and acidified by saturated potassium hydrogen sulfate solution to pH=2-3. The aqueous layer was extracted with EA (2×30 mL). the combined organics were washed with brine and dried over sodium sulfate. After removal of solvent, it gave (2R,6S,13aS,14aR,16aS,Z)-6-(tert-butoxycarbonylamino)-2-(4-fluoroisoindoline-2-carbonyloxy)-9-(2-nitrophenylsulfonyl)-5,16-dioxo-1,2,3,5,6,7,8,9,10,11,13a,14,14a,15,16,16a-hexadecahydrocyclopropa(n)pyrrolo[2,1-c][1,4, 9]triazacyclopentadecine-14a-carboxylic acid as white solid (1.40 g, 99%). MS: Calcd.: 814. Found: [M+H]+ 815. 1H NMR (400 MHz, d6-DMSO) δ 1.24 (s, 1H), 8.84 (s, 1H), 8.01 (m, 2H), 7.86 (m, 2H), 7.36 (m, 1H), 7.10-7.26 (m, 3H), 5.49 (m, 1H), 5.39 (m, 1H), 5.27 (m, 1H), 4.67 & 4.66 (s, 4H), 4.40 (m, 1H), 4.27 (m, 1H), 3.97 (m, 1H), 3.66 (m, 1H), 3.31-3.53 (m, 2H), 3.23 (m, 1H), 2.96 (m, 1H), 2.55 (m, 1H), 2.25 (m, 2H), 1.99 (m, 2H), 1.91 (m, 2H), 0.96-1.69 (m, 11H).

1. customThe aqueous layer was separated
2. extractionThe aqueous layer was extracted with EA (2×30 mL)
3. washthe combined organics were washed with brine
4. dry with materialdried over sodium sulfate
5. customAfter removal of solvent, it