[CH:1]([C:3]1[CH:8]=[C:7]([C:9]([F:12])([F:11])[F:10])[CH:6]=[CH:5][C:4]=1[NH:13]C(=O)C(C)(C)C)=O.[H-].[Li+].[F:22][C:23]([F:32])([F:31])/[CH:24]=[CH:25]/[C:26]([O:28][CH2:29][CH3:30])=[O:27].C(OCC)(=O)C>CS(C)=O>[F:10][C:9]([F:11])([F:12])[C:7]1[CH:8]=[C:3]2[C:4](=[CH:5][CH:6]=1)[NH:13][CH:24]([C:23]([F:31])([F:32])[F:22])[C:25]([C:26]([O:28][CH2:29][CH3:30])=[O:27])=[CH:1]2
To a suspension of N-(2-formyl-4-(trifluoro-methylphenyl)-2,2-dimethyl propanamide (Step 2) (921 mg, 3.7 mol) and lithium hydride (115 mg, 14.5 mmol) in dimethyl sulfoxide (10 mL) was added ethyl 4,4,4-trifluorocrotonate (2.83 g, 16.8 mmol) and the contents warmed to 30° C. for 4 hours. After the addition of ethyl acetate (50 mL), the reaction was washed with water (2×30 mL), saturated ammonium chloride solution (2×30 mL), dried over sodium sulfate and filtered. The filtrate was concentrated in vacuo to afford a yellow solid. The product was purified by flash chromatography (silica gel, eluant: ethyl acetate-hexanes, 1:9) to yield, upon concentration of the appropriate fractions, ethyl 6-trifluoromethyl-1,2-dihydro-2-(trifluoromethyl)-3-quinolinecarboxylate as a yellow solid (65 mg, 5%): mp 138-139° C. 1H NMR (CDCl3/300 MHz) 7.67 (s, 1H), 7.26 (s, 1H), 7.04 (d, 1H, J=6.6 Hz), 6.62 (m, 1H,), 5.14 (m, 1H), 4.60 (brs, 1H), 4.32 (m, 2H), 1.35 (t, 3H, J=7.0 Hz). ESHRMS m/z 338.0592 (M−H, Calc'd 338.0616). Anal. Calc'd for C13H11F3NO2: C, 49.57; H, 3.27; N, 4.13; Found: C, 49.23; H, 2.81; N, 3.93.
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