Hydrochloric Acid → HCID 66811846, compound

Participants

Reaction Steps

In aqueous MeOH, dissolved was 5-[7-{3-(cyclopropylmethoxy)-4-(difluoromethoxy)phenyl}-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]pyridine-2-carboxylic acid methyl ester (Compound 138) (0.05 g, 0.11 mmol), and LiOH (0.013 g, 0.32 mmol) was slowly added thereto. By using dilute HCl, pH of the reaction mixture was adjusted to 4˜5. The mixture was extracted three times with EA, and the extract was washed twice with brine, dried over MgSO4, filtered, and evaporated under reduced pressure to remove solvent. The mixture was purified via silica gel column chromatography (MeOH) to obtain desired compound, 5-[7-{3-(cyclopropylmethoxy)-4-(difluoromethoxy)phenyl}-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]pyridine-2-carboxylic acid (Compound 137) (0.017 g, 35%).

Provenance & Evidence