Water → 7-(2,4-Difluorophenyl)-2-[1-(propan-2-yl)piperidin-4-yl][1,2,4]triazolo[1,5-c]pyrimidin-5(6H)-one

Participants

Reaction Conditions

Reaction Steps

2.0 g (4.12 mmol) of ethyl[(Z)-2-cyano-1-(2,4-difluorophenyl)ethenyl]carbamate (Example 37A) and 916 mg (4.95 mmol) of 1-(propan-2-yl)piperidin-4-carbohydrazide (Example 38A) were dissolved in 24 ml of N-methylpyrrolidone, and the mixture was stirred under argon at an oil bath temperature of 160° C. in a flask with fitted calcium chloride drying tube for 6 h. The reaction mixture was cooled to RT, water (50 ml) was added and the mixture was stirred for 15 min. The mixture was extracted with ethyl acetate (three times 50 ml each) and the combined organic phases were freed from the solvent. The residue was purified by preparative HPLC (Method 11). This gave 660 mg (41% of theory) of the product.

Provenance & Evidence