Sodium Hydroxide → 4-((5-Chloro-1-methyl-6-oxo-1,6-dihydropyridin-3-ylamino)(4-chloro-2-fluorophenyl)methyl)-1-(2,4-dimethoxypyrimidin-5-yl)-5-isopropyl-1H-pyrazole-3-carboxylic acid

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Reaction Conditions

Reaction Steps

A solution of 465 mg (0.743 mmol) ethyl 4-((5-chloro-1-methyl-6-oxo-1,6-dihydropyridin-3-ylamino)(4-chloro-2-fluorophenyl)methyl)-1-(2,4-dimethoxypyrimidin-5-yl)-5-isopropyl-1H-pyrazole-3-carboxylate (product from step 184.2) in 7.42 ml THF/MeOH (1:1) under N2 atmosphere was cooled down to 0° C. After that 2.60 ml (5.20 mmol) of a 2M NaOH solution was added drop wise and the solution was stirred at 0° C. for 10 min and at RT for 1.5 hour. The solvent was evaporated, diluted in 50 ml CH2Cl2 and washed with 1M citric acid aqueous solution (30 ml). The water phase was extracted twice with CH2Cl2. The combined organic phases were dried (Na2SO4), filtered and evaporated to give 461 mg (0.741 mmol, 100% yield) of the title compound as a foam, which was used in the next step without purification. LCMS: (M+H)=591/593; tR=0.97 min (LC-MS 4). HPLC: tR=4.69 min (HPLC 7). TLC: R=0.14 (CH2Cl2/MeOH 20:1).

Provenance & Evidence