反应详情

To a solution of methyl 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-(acetyl(2-(1,1-dioxido-4-thiomorpholinyl)ethyl)amino)-1-isopropenyl-5a,5b,8,8,11a-pentamethyl-2,3,3a,4,5,5a,5b,6,7,7a,8,11,11a,11b,12,13,13a,13b-octadecahydro-1H-cyclopenta[a]chrysen-9-yl)benzoate (40 mg, 0.054 mmol) in 1,4-dioxane (1 mL) was added NaOH (1N) (0.27 mL, 0.27 mmol). The mixture was stirred at rt for 16.5 h then was purified directly by prep HPLC. The fractions containing the expected product were combined and concentrated under reduced pressure to give 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-(acetyl(2-(1,1-dioxido-4-thiomorpholinyl)ethyl)amino)-1-isopropenyl-5a,5b,8,8,11a-pentamethyl-2,3,3a,4,5,5a,5b,6,7,7a,8,11,11a,11b,12,13,13a,13b-octadecahydro-1H-cyclopenta[a]chrysen-9-yl)benzoic acid (14 mg, 0.018 mmol, 33%) as a white solid. LCMS: m/e 733.5 (M+H)+, 1.96 min (method 2). 1H NMR (400 MHz, Chloroform-d) δ=7.99 (d, J=7.8 Hz, 2H), 7.22 (d, J=7.8 Hz, 2H), 5.23 (d, J=4.0 Hz, 1H), 4.85 (br. s., 1H), 4.68 (br. s., 1H), 3.65 (br. s., 2H), 3.40-3.04 (m, 8H), 2.97-2.46 (m, 4H), 1.74 (s, 3H), 1.27 (s, 3H), 1.03-0.98 (m, 9H), 0.95 (br. s., 3H), 0.89 (br. s., 3H), 2.20-0.71 (m, 21H).

1. customthen was purified directly by prep HPLC
2. additionThe fractions containing the expected product
3. concentrationconcentrated under reduced pressure