HRID1591555

反应详情

EQUATION

反应方程式

HRID 1591555 的结构方程式

PROCEDURE

实验过程

Preparation of 4-(4-trifluoromethyl-benzyl)-benzoic acid methyl ester (compound 40A) A solution of 1-bromo-4-trifluoromethyl-benzene (10.0 g, 44.4 mmol) in THF at −78° C. was treated with dropwise addition of n-butyl lithium (33.3 mL of a 1.6 M solution in hexanes). After 20 minutes, 4-formyl-benzoic acid methyl ester in 50 mL THF was added. The reaction was allowed to come to room temperature and after 1 H, quenched with sat. NH4Cl. The reaction was then concentrated in vacuo, taken up in EtOAc, and washed with 2 M HCl (1×100 mL), brine (1×100 mL), dried (Na2SO4) and the solvent removed in vacuo to give the alcohol intermediate. Purification by flash column chromatography (gradient elution: 5% EtOAc/hexane to 40% EtOAc/hexane) gave 6.2 g of the alcohol intermediate. 4.0 g (12.9 mmol) of the intermediate was then hydrogenated in EtOAc using 0.5 g of 10% Pd(OH)2/C as catalyst. Filtration through Celite®, and concentration in vacuo gave the title compound (3.60 g, 95%). MS m/z 295 (M+1). Step 2. Preparation of [4-(4-trifluoromethyl-benzyl)-phenyl]-methanol (compound 40B) A solution of 40A (3.6 g, 12.2 mmol) in 75 mL THF at room temperature was treated portionwise with lithium aluminum hydride (0.97 g, 25.6 mmol). After 1 hour, the reaction mixture was carefully quenched with sat. NH4Cl. The reaction mixture was then extracted with EtOAc, and the organic layer washed with 2 M HCl (1×50 mL), brine (1×50 mL), dried (Na2SO4) and the solvent removed in vacuo. Purification by flash column chromatography (gradient elution: 5% EtOAc/hexane to 40% EtOAc/hexane) gave the title compound (2.8 g, 86%). MS m/z 265 (M−1). Step 3. Preparation of Chloro-[4-(4-trifluoromethyl-benzyl)-phenyl]-methane (compound 40C) The title compound was prepared in a similar manner as described for 3B using 40B and thionyl chloride. 400 MHz 1H NMR (DMSO-d6) 7.59 (d, 2H, J=8.4 Hz), 7.40 (d, 2H, J=8.4 Hz), 7.31 (d, 2H, J=8.4 Hz), 7.20 (d, 2H, J=8.4 Hz), 4.67 (s, 2H), 3.99 (s, 2H). Step 4. Preparation of {7-[4-(4-Trifluoromethyl-benzyl)-benzylsulfanyl]-indan-4-yloxy}-acetic acid methyl ester (compound 40D) The title compound was prepared in the manner analogous to Example 1F using the product from Example 12C and Example 40C. MS m/z 487 (M+1). Step 5. Preparation of {7-[4-(4-trifluoromethyl-benzyl)-benzylsulfanyl]-indan-4-yloxy}-acetic acid (compound 40) The title compound was prepared in the manner analogous to Example 1 using 40D. IR cm−1: 1745, 1704, 1325; 400 MHz 1H NMR (DMSO-d6) δ 7.58 (d, 2H, J=8.1 Hz), 7.37 (d, 2H, J=8.1 Hz), 7.09 (s, 2H), 7.05 (d, 2H, J=8.3 Hz), 6.55 (d, 1H, J=8.3 Hz), 4.60 (s, 2H), 3.94 (s, 4H), 2.71 (t, 2H, J=8.3 Hz), 2.58 (t, 2H, J=8.3 Hz), 1.81 (m, 2H); MS m/z 473 (M+1). Anal. Calc'd for C26H23F3O3S.0.1 H2O, C, 65.84; H, 4.93; found: C, 65.58; H, 4.96.

WORKUP

后处理

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