Sodium Hydroxide → 2-[(1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-1-isopropenyl-5a,5b,8,8,11a-pentamethyl-3a-(2-morpholinoethylamino)-1,2,3,4,5,6,7,7a,11,11b,12,13,13a,13b-tetradecahydrocyclopenta[a]chrysen-9-yl]spiro[3.3]hept-2-ene-6,6-dicarboxylic acid

Participants

Reaction Conditions

Reaction Steps

To a solution of diisopropyl 6-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-5a,5b,8,8,11a-pentamethyl-3a-((2-morpholinoethyl)amino)-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)spiro[3.3]hept-5-ene-2,2-dicarboxylate (9 mg, 0.011 mmol) in 1,4-dioxane (1 mL) and MeOH (0.5 mL) was added 1N NaOH (0.5 mL, 0.500 mmol)). The mixture was stirred at 50° C. for 3 h. The crude product was purified by Prep HPLC using method 14 to give desired product in 74% yield as a solid. MS: m/e 703.6 (M+H)+, 2.42 min (method 4). 1H NMR (400 MHz, METHANOL-d4) δ 5.96 (s, 1H), 5.54 (dd, J=6.1, 1.6 Hz, 1H), 4.81 (s, 1H), 4.70 (s, 1H), 3.80-3.67 (m, 4H), 3.15-3.01 (m, 2H), 2.94-2.76 (m, 2H), 2.76-2.58 (m, 8H), 2.52 (br. s., 2H), 2.22-2.14 (m, 1H), 2.10-1.87 (m, 2H), 1.83-1.07 (m, 19H), 1.76 (s, 3H), 1.24 (s, 3H), 1.18 (s, 4H), 1.09 (s, 6H), 0.85 (s, 3H).

Provenance & Evidence