Diisopropylethylamine → N-{2,4-Dimethyl-5-[6-(pyridin-3-yl)-1H-imidazo[1,2-b]pyrazol-1-yl]phenyl}-3-formyl-5-(penta-fluoro-lambda6-sulphanyl)benzamide

Participants

Reaction Steps

214 mg (0.659 mmol, 85% pure) of the compound from Example 36A and 301 mg (0.791 mmol) of HATU were dissolved in 2.3 ml of anhydrous DMF, and 140 μl (0.791 mmol) of N,N-diisopropylethylamine were added. After 30 min, 200 mg (0.659 mmol) of the compound of Example 11A were added. After the reaction mixture had been stirred at RT for 1.5 h, about 50 ml of water were added and the mixture was extracted three times with in each case about 50 ml of ethyl acetate. The combined organic extracts were washed with saturated sodium chloride solution, dried over anhydrous magnesium sulphate, filtered and freed from the solvent on a rotary evaporator. The crude product obtained in this manner was purified by MPLC (30 g of silica gel, mobile phase gradient cyclohexane/ethyl acetate 1:1→1:5). Evaporation of the product fractions and drying of the residue under high vacuum gave 160 mg (36% of theory, 85% pure) of the title compound.

Provenance & Evidence