Water → ethyl 5-[4-(2-isopropyloxy-3,5-dimethylpyridin-4-yl)-2-nitrophenyl]-1-[(S)-tetrahydrofuran-3-yl]-1H-pyrazole-4-carboxylate

Participants

Reaction Conditions

Reaction Steps

Ethyl 5-(4-bromo-2-nitrophenyl)-1-[(S)-tetrahydrofuran-3-yl]-1H-pyrazole-4-carboxylate obtained in Preparation Example 7-(1) (200 mg) was converted to ethyl 5-[2-nitro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]-1-[(S)-tetrahydrofuran-3-yl]-1H-pyrazole-4-carboxylate by the same method as in Preparation Example 7-(2). A solution of 4-iodo-2-isopropyloxy-3,5-dimethylpyridine obtained in Preparation Example 47 (142 mg) in DMF (0.5 mL), and water (0.5 mL) were added to the reaction mixture, and the mixture was stirred at 110° C. for two hours. The reaction mixture was cooled to room temperature and then partitioned by adding ethyl acetate and water. The aqueous layer was extracted with ethyl acetate. The combined organic layers were dried over anhydrous magnesium sulfate and filtered. The filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate/n-heptane, 50% to 100%) to give the title compound (138.1 mg).

Provenance & Evidence