Trifluoroacetic acid → 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-5a,5b,8,8,11a-pentamethyl-1-(prop-1-en-2-yl)-3a-(2-(pyrimidin-2-ylamino)ethylamino)-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

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Reaction Steps

The title compound was prepared following a similar procedure as described for the synthesis of 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-5a,5b,8,8,11a-pentamethyl-3a-(2-(6-methylpyridazin-3-ylamino)ethylamino)-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, except 2-bromopyrimidine (0.016 g, 0.100 mmol) was used in place of 3-bromo-6-methylpyridazine. Iterative purification of the crude mixture by reverse phase preparative HPLC first using Prep HPLC Method 9 and then repurification by Prep HPLC Method 10 gave the title compound as a white glassy solid (8.0 mg, 8.2% yield) bis TFA salt. LCMS: m/e 651.5 (M+H)+, 2.27 min (method 11).

Provenance & Evidence