Potassium Carbonate → (S)-1-(6-(1-cyclopropyl-1H-pyrazol-4-yl)-2-methyl-5-(3-methylpyridin-2-yloxy)-3,4-dihydroquinolin-1(2H)-yl)ethanone

HRID 1051662Notes

Reaction equation

HRID 1051662 reaction equation
Br[C:2]1[C:3]([O:16][C:17]2[C:22]([CH3:23])=[CH:21][CH:20]=[CH:19][N:18]=2)=[C:4]2[C:9](=[CH:10][CH:11]=1)[N:8]([C:12](=[O:14])[CH3:13])[C@@H:7]([CH3:15])[CH2:6][CH2:5]2.C(=O)([O-])[O-].[K+].[K+].[CH:30]1([N:33]2[CH:37]=[C:36](B3OC(C)(C)C(C)(C)O3)[CH:35]=[N:34]2)[CH2:32][CH2:31]1.O1CCOCC1>C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2].O>[CH:30]1([N:33]2[CH:37]=[C:36]([C:2]3[C:3]([O:16][C:17]4[C:22]([CH3:23])=[CH:21][CH:20]=[CH:19][N:18]=4)=[C:4]4[C:9](=[CH:10][CH:11]=3)[N:8]([C:12](=[O:14])[CH3:13])[C@@H:7]([CH3:15])[CH2:6][CH2:5]4)[CH:35]=[N:34]2)[CH2:32][CH2:31]1

Participants

7

Reactant 4

HCID 11430Potassium CarbonateHCID 312751,4-DioxaneHCID 593271331-Cyclopropyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazoleHCID 118086323(S)-1-(6-bromo-2-methyl-5-(3-methylpyridin-2-yloxy)-3,4-dihydroquinolin-1(2H)-yl)ethanone

Product 1

HCID 118076169(S)-1-(6-(1-cyclopropyl-1H-pyrazol-4-yl)-2-methyl-5-(3-methylpyridin-2-yloxy)-3,4-dihydroquinolin-1(2H)-yl)ethanone

Reagents, catalysts & solvents 2

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)CatalystHCID 962WaterSolvent

Conditions

Temperature
100 °C

Procedure

A 100-mL, round-bottom flask was charged with (S)-1-(6-bromo-2-methyl-5-(3-methylpyridin-2-yloxy)-3,4-dihydroquinolin-1(2H)-yl)ethanone (0.129 g, 0.34 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (0.025 g, 0.03 mmol), potassium carbonate (0.142 g, 1.03 mmol), 1-cyclopropyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (0.243 g, 1.04 mmol), 1.4-dioxane (10 mL) and water (2 mL). The resulting mixture stirred overnight at 100° C. After cooling to room temperature, the reaction mixture was passed through a short pad of Celite, and the filtrate was concentrated under vacuum. The residue was purified by preparative thin layer chromatography (eluting with 50% ethyl acetate-petroleum ether). The product was further purified by preparative-HPLC with the following conditions (Waters I): Column, SunFire Prep C18, 19×150 mm; mobile phase, water (0.05% ammonium bicarbonate) and acetonitrile (54% to 80% acetonitrile in 10 min, flow rate: 20 mL/min); Detector, UV 220&254 nm. This afforded (S)-1-(6-(1-cyclopropyl-1H-pyrazol-4-yl)-2-methyl-5-(3-methylpyridin-2-yloxy)-3,4-dihydroquinolin-1(2H)-yl)ethanone (0.0285 g, 21%) as an off-white solid. 1H NMR (300 MHz, CD3OD) δ ppm 1.00-1.03 (m, 4H), 1.16 (d, J=6.60 Hz, 3H), 1.32-1.42 (m, 1H), 2.20-2.28 (m, 5H), 2.48 (s, 3H), 2.54-2.59 (m, 1H), 3.57-3.64 (m, 1H), 4.75-4.80 (m, 1H), 6.95-7.00 (m, 1H), 7.22-7.27 (m, 1H), 7.54 (d, J=8.40 Hz, 1H), 7.63 (s, 1H), 7.72-7.77 (m, 2H), 7.80 (s, 1H). MS (ESI, pos. ion) m/z 403 [M+H]+.

Workup

  1. temperatureAfter cooling to room temperature
  2. concentrationthe filtrate was concentrated under vacuum
  3. customThe residue was purified by preparative thin layer chromatography (eluting with 50% ethyl acetate-petroleum ether)
  4. customThe product was further purified by preparative-HPLC with the following conditions (Waters I)
  5. custommobile phase, water (0.05% ammonium bicarbonate) and acetonitrile (54% to 80% acetonitrile in 10 min, flow rate: 20 mL/min)

Sources & evidence

ORD record
ord-dbc27c49342c49c1867bf8757f46b006
Source dataset
uspto-grants-2016_07
Patent number
US09388161B2

Reaction notes

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