Water → 5-(4-Chlorophenyl)-2-(prop-2-yn-1-yl)-4-(3,3,3-trifluoro-2-hydroxypropyl)-2,4-dihydro-3H-1,2,4-triazol-3-one

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Reaction Steps

300 mg (0.98 mmol) of the compound from Example 4A were dissolved in 10 ml of acetonitrile, and 122 mg (1.02 mmol) of 3-bromo-1-propyne and 270 mg (1.95 mmol) of potassium carbonate were added. The mixture was heated at reflux for 1 h. For work-up, the reaction mixture was allowed to cool to RT and about 10 ml of water were added. The mixture was extracted twice with in each case 15 ml of ethyl acetate. The combined organic phases were dried over sodium sulfate, filtered and concentrated under reduced pressure. The crude product was purified chromatographically [Method 19]. This gave 166 mg (49% of theory) of the target compound.

Provenance & Evidence