Methanol → HCID 59822071, compound

Participants

Reaction Conditions

Reaction Steps

350 mg 15β-{3-[(5-methyl-1,3-thiazol-2-yl)amino]-3-oxopropyl}-17-oxoestra-1(10),2,4-triene-3-carboxylic acid methyl ester and 5 eq LiOH are mixed with 30 ml MeOH and 10 ml H2O and stirred at 50° C. (water bath) for about 4 h. Then a few mg LiOH, 30 ml MeOH and 10 ml H2O were added and the reaction mixture was stirred for another 2 h at 50° C. After reducing the solvents, H2O is added, the reaction mixture is extracted with EtOAc. The combined aquatic layers are acidified with KHSO4aq to pH 2-3, and extracted twice with EtOAc. The latter organic layers are combined, washed with brine, dried (Na2SO4) and the solvent removed. Purifying by column chromatography (CH2Cl2: MeOH:AcOH 37:3:0.1) give 150 mg pure 15β-{3-[(5-methyl-1,3-thiazol-2-yl)amino]-3-oxopropyl}-17-oxoestra-1(10),2,4-triene-3-carboxylic acid (=EXAMPLE 4, NMR data see below). 15β-{3-[(5-methyl-1,3-thiazol-2-yl)amino]-3-oxopropyl}-17-oxoestra-1(10),2,4-triene-3-carboxamide

Provenance & Evidence