Sodium Hydroxide → HCID 58110193, Verbindung

Beteiligte Stoffe

Reaktionsschritte

5-(1H-Pyrazol-4-yl)-thiophene-3-carboxylic acid methyl ester (2.8 g, 13.3 mmol) was dissolved in a mixture of methanol (18 mL) and a solution of aqueous sodium hydroxide (1 N, 18 mL) and the mixture stirred at 50° C. for 1.5 hours. The mixture was concentrated under vacuum and acidified with aqueous hydrochloric acid (1N). The resulting precipitate was isolated by filtration and washed with water before drying under vacuum to give the title compound as a white solid (1.77 g). LCMS m/z 195.1 [M+H]+. R.T.=3.23 min (Analytical Method 4). 1H NMR (400 MHz, d6-DMSO): δ 8.1 (s, 1H), 8.0 (m, 2H), 7.45 (s, 1H).

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