Diisopropylethylamine → 3-Formyl-N-{4-methyl-3-[6-(pyridin-3-yl)-1H-imidazo[1,2-b]pyrazol-1-yl]phenyl}-5-(pentafluoro-lambda6-sulphanyl)benzamide

Participants

Reaction Steps

320 mg (1.11 mmol) of the compound of Example 6A, 336 mg (1.22 mmol) of the compound of Example 36A and 504 mg (1.33 mmol) of HATU were dissolved in 3.3 ml of DMF, 0.23 ml (1.33 mmol) of N,N-diisopropylethylamine were added and the mixture was stirred at RT for 3 h. The reaction was then stirred into 30 ml of semiconcentrated aqueous sodium bicarbonate solution. After 10 min of stirring at RT, the precipitate formed was filtered off, washed with water and dried. The crude product obtained in this manner was purified by preparative HPLC (Method 12). The product fractions were concentrated, the residue was dissolved in ethyl acetate and the mixture was washed successively with saturated sodium bicarbonate solution and saturated sodium chloride solution. The organic phase was dried over sodium sulphate, filtered and concentrated under reduced pressure. Drying of the residue gave 100 mg (16% of theory) of the title compound.

Provenance & Evidence