Quinoline → 1-[4-(7-Trifluoromethyl-benzo[b]thiophen-3-yl)-piperidin-1-yl]-ethanone

HRID 456552Notes

Reaction equation

[C:1]([N:4]1[CH2:9][CH2:8][CH:7]([C:10]2[C:11]3[CH:21]=[CH:20][CH:19]=[C:18]([C:22]([F:25])([F:24])[F:23])[C:12]=3[S:13][C:14]=2C(O)=O)[CH2:6][CH2:5]1)(=[O:3])[CH3:2].N1C2C(=CC=CC=2)C=CC=1>C(OCC)(=O)C>[F:25][C:22]([F:23])([F:24])[C:18]1[C:12]2[S:13][CH:14]=[C:10]([CH:7]3[CH2:6][CH2:5][N:4]([C:1](=[O:3])[CH3:2])[CH2:9][CH2:8]3)[C:11]=2[CH:21]=[CH:20][CH:19]=1

Participants

Conditions

Temperature: 200 °C

Procedure

A mixture of 3-(1-acetyl-piperidin-4-yl)-7-trifluoromethyl-benzo[b]thiophene-2-carboxylic acid (4.13 g, 11.1 mmol), Cu powder (0.706 g, 11.1 mmol), and quinoline (20 mL) was heated to 200° C. under nitrogen. After 10 min, no gas evolution was observed and the reaction cooled at room temperature. The mixture was diluted with ethyl acetate (100 mL), filtered through a Celite bed and the filtrate washed with 1 N HCl (2×100 mL), 5% aqueous potassium carbonate (100 mL), water (100 mL), and brine (100 mL) successively. The organics were dried over magnesium sulfate, filtered, and concentrated to give an amber oil. The oil was chromatographed on silica, eluting with 10% methanol/ethyl acetate to afford 2.69 g (74%) of the desired product as a tan solid.

Workup

temperaturethe reaction cooled at room temperature
filtrationfiltered through a Celite bed
washthe filtrate washed with 1 N HCl (2×100 mL), 5% aqueous potassium carbonate (100 mL), water (100 mL), and brine (100 mL) successively
dry with materialThe organics were dried over magnesium sulfate
filtrationfiltered
concentrationconcentrated
customto give an amber oil
customThe oil was chromatographed on silica
washeluting with 10% methanol/ethyl acetate

Sources & evidence

ORD record: ord-a0d4d6f6ef9d4edda8e4d141db3f36f3
Source dataset: uspto-grants-2007_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07186724B2

Reaction notes

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