反応手順
The title compound was prepared following the method described above for the synthesis of 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-(2-(dimethylamino)-2-oxoethylamino)-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 2-chloro-N-methylacetamide as the alkylating reagent in Step 1. The product was isolated as a white solid (41 mg, 80%). LCMS: m/e 601.45 (M+H)+, 2.31 min (method 11). 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), 5.38 (d, J=4.58 Hz, 1H), 4.88 (s, 1H), 4.76 (s, 1H), 4.24 (d, J=15.56 Hz, 1H), 3.92 (d, J=15.26 Hz, 1H), 2.88 (s, 3H), 3.08-2.74 (m, 1H), 2.31-1.30 (m, 22H), 1.78 (s, 3H), 1.29 (s, 3H), 1.14 (s, 3H), 1.10 (s, 3H), 1.03 (s, 3H), 1.01 (s, 3H).
