Water → 2-[(5-Bromopyridin-3-yl)methyl]-5-(4-chlorophenyl)-4-[(2S)-3,3,3-trifluoro-2-hydroxypropyl]-2,4-dihydro-3H-1,2,4-triazol-3-one

Participants

Reaction Conditions

Reaction Steps

171 mg (0.56 mmol) of the compound from Example 5A and 543 mg (1.67 mmol) of cesium carbonate were dissolved in 11 ml of acetonitrile, and 135 mg (0.56 mmol) of 3-bromo-5-(chloromethyl)pyridine hydrochloride were added. The mixture was stirred at 65° C. for 5 h. After cooling to RT, 10 ml of water were added and the mixture was extracted three times with in each case 10 ml of ethyl acetate. The combined organic phases were dried over sodium sulfate, filtered and concentrated under reduced pressure. The crude product was purified by preparative HPLC [Method 19]. This gave 102 mg (38% of theory) of the target compound.

Provenance & Evidence