반응 단계
The title compound was prepared following the hydrolysis method described above for the synthesis of 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-(2-(2-hydroxyethylsulfonyl)ethylamino)-5a,5b,8,8,11a-pentamethyl-1-(prop-1-en-2-yl)-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 using methyl 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-(3-(tert-butoxycarbonylamino)propylamino)-5a,5b,8,8,11a-pentamethyl-1-(prop-1-en-2-yl)-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 (5 mg, 0.007 mmol) as starting material. The title compound was isolated as a white solid (3 mg, 58%). LCMS: m/e 687.54 (M+H)+, 2.69 min (method 10). 1H NMR (500 MHz, Acetic acid d4) δ ppm 8.04 (d, J=8.24 Hz, 2H), 7.30 (d, J=8.24 Hz, 2H), 5.37 (d, J=4.58 Hz, 1H), 4.87 (s, 1H), 4.74 (s, 1H), 3.38-3.17 (m, 4H), 3.04-2.86 (m, 1H), 2.36-1.17 (m, 24H), 1.77 (s, 3H), 1.50 (s, 9H), 1.25 (s, 3H), 1.14 (s, 3H), 1.09 (s, 3H), 1.02 (s, 3H), 1.00 (s, 3H).
