反应详情

温度

65 °C

Lithium hydroxide (16.3 g, 389 mmol) was added to a solution of ethyl 5-{[(3-chlorophenyl)methyl]oxy}-2-methylbenzoate (79 g, 259 mmol) in 1,4-dioxane (1 L) and water (0.5 L). The reaction mixture was stirred at 65° C. for 5 hours, allowed to cool and stood at room temperature for 14 hours. The reaction was concentrated to remove the 1,4-dioxane, and the resulting brown aqueous solution was washed with diethyl ether (3×1 L). The aqueous layer was then acidified with 2N HCl (approximately 200 ml) and the resulting precipitate filtered and washed with water to give a yellow solid. This was dried overnight at 40° C. in a vacuum oven to give the title compound as a yellow solid (66.38 g). MS (ES−) [C15H1335ClO3—H]− 275. 1H-NMR (400 MHz, d6-DMSO) δ 2.43 (3H, s), 5.14 (2H, s), 7.10-7.13 (1H, m), 7.21-7.23 (1H, m), 7.38-7.47 (4H, m), 7.52 (1H, s).

1. temperatureto cool
2. waitstood at room temperature for 14 hours
3. concentrationThe reaction was concentrated
4. customto remove the 1,4-dioxane
5. washthe resulting brown aqueous solution was washed with diethyl ether (3×1 L)
6. filtrationthe resulting precipitate filtered
7. washwashed with water
8. customto give a yellow solid
9. customThis was dried overnight at 40° C. in a vacuum oven