反应详情

Potassium tert-butoxide (15 mg, 0.13 mmol) was added at 0° C. to a solution of 3-(4-hydroxy-3-trifluoromethyl-phenyl)-2-methoxy-acrylic acid methyl ester (35 mg, 0.126 mmol) in dry N,N-dimethylformamide (0.6 mL). The mixture was stirred for 0.5 hours and 4-(3-Bromo-propoxy)-biphenyl (example 23, Step D) (45 mg, 0.15 mmol) was added. The reaction was stirred for 6 hours at room temperature and quenched with a saturated solution of ammonium chloride (10 mL). The aqueous layer was separated and extracted with methylene chloride (5×10 mL). The combined organic layers were dried (Na2SO4), filtered and concentrated under vacuum. The residue was chromatographed (silica gel, hexanes/ethyl acetate 8:2) to produce 3-{4-[3-(biphenyl-4-yloxy)-propoxy]-3-fluoromethyl-phenyl}-2-methoxy-acrylic acid methyl ester as a colorless oil (35 mg, 57%). 1H-NMR (CDCl3, 200.15 MHz): δ 8.00 (d, 1H, J=1.6), 7.89 (dd, 1H, J=8.6, 1.6), 7.46–7.26 (m, 7H), 7.05–6.93 (m, 4H), 4.33–4.20 (m, 4H), 3.86 (s, 3H), 3.79 (s, 3H), 2.33 (qn, 2H, J=5.9).

1. stirringThe reaction was stirred for 6 hours at room temperature
2. customquenched with a saturated solution of ammonium chloride (10 mL)
3. customThe aqueous layer was separated
4. extractionextracted with methylene chloride (5×10 mL)
5. dry with materialThe combined organic layers were dried (Na2SO4)
6. filtrationfiltered
7. concentrationconcentrated under vacuum
8. customThe residue was chromatographed (silica gel, hexanes/ethyl acetate 8:2)