Hydrochloric Acid → Ethyl 3-{4-[4-({2-[17-(3-Carboxy-1-methylpropyl)-7,12-dihydroxy-10,13-dimethylhexadecahydrocyclopenta[a]phenanthren-3-yloxy]ethylcarbamoyl}methyl)phenoxy]-3,5-difluorophenyl}-2-methylacrylate

Participants

Reaction Conditions

Reaction Steps

610 mg of 4-(7,12-dihydroxy-3-{2-[2-(4-hydroxyphenyl)acetylamino]ethoxy}-10,13-dimethylhexadecahydrocyclopenta[a]phenanthren-17-yl)pentanoic acid, 232 mg of ethyl 2-methyl-3-(3,4,5-trifluorophenyl)acrylate and 393 mg of K2CO3 are suspended in 5 ml of DMF (anhydrous) and the suspension is stirred at 150° C. for 160 minutes. After cooling, the reaction mixture is taken up using 150 ml of a 2N aqueous HCl solution and extracted three times using 100 ml of EA each time. The extract is dried over Na2SO4 and the solvent is removed in vacuo. Chromatography on silica gel using EA/MeOH 10:1 yields 480 mg of resinous product.

Provenance & Evidence