Methanol → HCID 9968698, compound

Participants

Reaction Conditions

Reaction Steps

To a mixture of 3-(4-Chloro-benzoylamino)-5-phenyl-thiophene-2-carboxylic acid methyl ester (30 mg, 0.081 mmol) in 1 ml of a 3:2:1 solution made with tetrahydrofuran, methanol and water respectively was added lithium hydroxide monohydrated (20 mg, 0.484 mmol). The mixture was stirred 30 minutes at 60° C., cooled to room temperature, diluted with water and washed with ether (2×). The collected aqueous layer was then acidified with KHSO4 20% to pH 3 and extracted with ethyl acetate (3×). The combined ethyl acetate layers were washed with brine, dried (Na2SO4) and concentrated. The resulting crude was taken in ethyl acetate and reextracted with NaOH 0.5 N (2×). The combined aqueous layers were then back-washed with ethyl acetate and acidified to pH3 with KHSO4 20% and back-extracted with ethyl acetate (2×). The combined organic layers were washed with brine and dried (Na2SO4). 1H NMR (DMSO-d6, 400 MHz) 8.35 (s, 1H), 8.02-7.99 (m, 2H), 7.71-7.68 (m, 2H), 7.56-7.53 (m, 2H), 7.43-7.39 (m, 2H), 7.35-7.31 (m, 1H).

Provenance & Evidence