Tetrahydrofuran → 1-[4-(4-Nitro-3-trifluoromethyl-phenylamino)-piperidin-1-yl]-2-[1-(4-trifluoromethyl-phenyl)-piperidin-4-yloxy]-ethanone

[1-(4-Trifluoromethyl-phenyl)-piperidin-4-yloxy]-acetic acid (186 mg; 0.61 mmol, prepared according to Example 11), diisopropylethyl amine (220 μL; 1.22 mmol) and tetramethyl-β-(1H-benzotriazol-1-yl)uronium hexafluorophosphate (232 mg; 0.61 mmol) are diluted in a 2 to 1 mixture of dimethylformamide and tetrahydrofuran (18 mL) and the resulting solution is stirred for 5 minutes. A solution of (4-nitro-3-trifluoromethyl-phenyl)-piperidin-4-yl-amine hydrochloride (200 mg; 0.61 mmol, prepared in accordance with Example 8) in dimethylformamide (6 mL) is added and the reaction is then stirred for 3 hours at room temperature. Following dilution with dichloromethane (50 mL), the organic layer is sequentially washed with water (15 mL), aq. sat. sodium hydrogen carbonate (15 mL), is dried over magnesium sulfate and concentrated under reduced pressure. The desired product (209 mg; 0.36 mmol) is isolated in pure form following purification by column chromatography on silica gel (dichloromethane:methanol from 100:0 to 95:5). The structure was confirmed using Protocol II-E. Calculated mass=575; observed mass=576; HPLC retention time=11.52 min.

1. stirringthe reaction is then stirred for 3 hours at room temperature
2. washthe organic layer is sequentially washed with water (15 mL), aq. sat. sodium hydrogen carbonate (15 mL)
3. dry with materialis dried over magnesium sulfate
4. concentrationconcentrated under reduced pressure

ORD-Eintrag

ord-fe5bd65da3ca45218ee7b0c976867dc5

Quelldatensatz

uspto-grants-2015_08

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09096524B2