Sodium Hydroxide → HCID 67952361, compound

Participants

Reaction Conditions

Reaction Steps

Saponification of the intermediates A6 was conducted as followed: to a solution of (1S,2R,4aS,6aS,6bR,8aR,12aS,12bR,14bS)-10-(4-(methoxycarbonyl)phenyl)-1,2,6a,6b,9,9,12a-heptamethyl-1,2,3,4,4a,5,6,6a,6b,7,8,8a,9,12,12a,12b,13,14b-octadecahydropicene-4-a-carboxylic acid (intermediate A6) (20 mg, 0.035 mmol) in a mixture of dioxane (1 mL) and methanol (0.5 mL) was added a 1N solution of NaOH (0.5 mL, 0.5 mmol). The mixture was warmed to 65° C. for 2 h. The crude product was further purified by preparative HPLC(YMC Combiprep ODS 30×50 mm S5 column) eluted with gradient mixture of MeOH/water/TFA. The desired fractions were combined, evaporated to afford the title compound (12 mg, 61%).

Provenance & Evidence