Potassium Carbonate → 7-Chloro-8-fluoro-4-methyl-2-phenylquinoline

HRID 493866Notes

Reaction equation

HRID 493866 reaction equation
Br[C:2]1[C:11]2[C:6](=[C:7]([F:13])[C:8]([Cl:12])=[CH:9][CH:10]=2)[N:5]=[C:4]([C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)[CH:3]=1.[CH3:20]B(O)O.C(=O)([O-])[O-].[K+].[K+].O1CCOCC1>C(OCC)(=O)C.O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[Cl:12][C:8]1[C:7]([F:13])=[C:6]2[C:11]([C:2]([CH3:20])=[CH:3][C:4]([C:14]3[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=3)=[N:5]2)=[CH:10][CH:9]=1

Participants

8

Reactant 4

HCID 11430Potassium CarbonateHCID 312751,4-DioxaneHCID 139377Methylboronic AcidHCID 576810164-Bromo-7-chloro-8-fluoro-2-phenylquinoline

Product 1

HCID 576810927-Chloro-8-fluoro-4-methyl-2-phenylquinoline

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
108 °C

Procedure

4-Bromo-7-chloro-8-fluoro-2-phenylquinoline (1.1 g, 03.3 mmol), methane boronic acid (196 mg, 3.27 mmol), potassium carbonate (1.4 g, 9.8 mmol) and 1,4-dioxane (4 mL) were combined and stirred in a 10 mL R.B. flask. The flask was subjected to 3 vacuum-argon cycles. Tetrakis(triphenylphosphine)palladium(0) (380 mg, 0.33 mmol) was added, and the reaction was again subjected to 3 vacuum argon-cycles. The reaction was heated at 108° C. (external temperature) for 27H, at which point the reaction was allowed to cool, and was diluted with ethyl acetate (30 mL), and water (30 mL). The layers were separated, and the aqueous layer extracted with ethyl acetate (30 mL). The organics were combined, dried over sodium carbonate, and concentrated in vacuo. The residue was chromatographed on silica gel, eluting with hexanes:methylene chloride 2:1. This afforded the title compound as a white solid; 1H NMR (CDCl3, 400 MHz) δ 2.75 (s, 3H), 7.47-7.55 (m, 4H), 7.69-7.72 (dd, 1H, J=8.9 & 1.6 Hz), 7.77 (s, 1H), 8.18-8.21 (m, 2H); MS(APCI+): 272.07 (100) [MH+], 274.03 (30) [(M+2)H+]; HPLC tR=3.80 min (OpenLynx, nonpolar—5 min).

Workup

  1. temperatureto cool
  2. customThe layers were separated
  3. extractionthe aqueous layer extracted with ethyl acetate (30 mL)
  4. dry with materialdried over sodium carbonate
  5. concentrationconcentrated in vacuo
  6. customThe residue was chromatographed on silica gel
  7. washeluting with hexanes:methylene chloride 2:1

Sources & evidence

ORD record
ord-ca5656c0ca684b57bd9f17e39c3e6ae4
Source dataset
uspto-grants-2009_05
Patent number
US07534797B2

Reaction notes

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