反应详情

A mixture of 5-(2-phenylethyl)-3-[4-(trifluoromethyl)phenyl]-1H-pyrazole (350 mg, 1.11 mmol), sodium hydride (60% in oil, 40 mg, 1.00 mmol) and N,N-dimethylformamide (5 mL) was stirred at room temperature for 1 hr. Methyl 3-(4-([4-(chloromethyl)benzyl]oxy)phenyl)propanoate (318 mg, 1.00 mmol) was added to the reaction mixture at room temperature and the mixture was further stirred at room temperature for 1 hr. The reaction mixture was poured into 1N hydrochloric acid, and the mixture was extracted with ethyl acetate. The ethyl acetate layer was dried using a Presep Dehydration tube (Manufactured by Wako Pure Chemical Industries, Ltd.), and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane:ethyl acetate=19:1-1:1) to give a yellow oil. The yellow oil was dissolved in a mixed solvent of methanol (5 mL) and tetrahydrofuran (5 mL), and 2 N aqueous sodium hydroxide solution (2 mL) was added. The mixture was stirred at room temperature for 1 hr. The reaction mixture was diluted with water, and neutralized with 1 N hydrochloric acid. The mixture was extracted with ethyl acetate. The ethyl acetate layer was dried using a Presep Dehydration tube (Manufactured by Wako Pure Chemical Industries, Ltd.), and concentrated under reduced pressure to give the title compound (550 mg, yield 75%) as colorless crystals. MS: m/z 585 (MH+), 1H NMR (CDCl3) δ: 2.58-2.67 (2H, m), 2.80-2.94 (6H, m), 5.00 (2H, s), 5.26 (2H, s), 6.46 (1H, s), 6.86 (2H, d, J=8.9 Hz), 7.06-7.14 (6H, m), 7.18-7.32 (3H, m), 7.36 (2H, d, J=8.3 Hz), 7.63 (2H, d, J=8.1 Hz), 7.90 (2H, d, J=8.1 Hz).

1. stirringthe mixture was further stirred at room temperature for 1 hr
2. extractionthe mixture was extracted with ethyl acetate
3. dry with materialThe ethyl acetate layer was dried
4. concentrationconcentrated under reduced pressure
5. customThe residue was purified by silica gel column chromatography (hexane:ethyl acetate=19:1-1:1)
6. customto give a yellow oil
7. additionwas added
8. stirringThe mixture was stirred at room temperature for 1 hr
9. extractionThe mixture was extracted with ethyl acetate
10. dry with materialThe ethyl acetate layer was dried
11. concentrationconcentrated under reduced pressure