Potassium Carbonate → HCID 59320381, compound

HRID 655243Notes

Reaction equation

HRID 655243 reaction equation
Br[C:2]1[CH:3]=[N:4][C:5]2[C:10]([CH:11]=1)=[CH:9][C:8]([CH2:12][C:13]([OH:15])=[O:14])=[CH:7][CH:6]=2.[CH3:16][N:17]1[CH:21]=[C:20](B2OC(C)(C)C(C)(C)O2)[CH:19]=[N:18]1.O1CCOCC1.C(=O)([O-])[O-].[K+].[K+]>Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.O>[CH3:16][N:17]1[CH:21]=[C:20]([C:2]2[CH:3]=[N:4][C:5]3[C:10]([CH:11]=2)=[CH:9][C:8]([CH2:12][C:13]([OH:15])=[O:14])=[CH:7][CH:6]=3)[CH:19]=[N:18]1

Participants

7

Reactant 4

HCID 11430Potassium CarbonateHCID 312751,4-DioxaneHCID 27739871-Methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazoleHCID 59320341(3-Bromoquinolin-6-yl)acetic acid

Product 1

HCID 59320381HCID 59320381, compound

Reagents, catalysts & solvents 2

HCID 178418476HCID 178418476, compoundCatalystHCID 962WaterSolvent

Conditions

Temperature
130 °C

Procedure

To a 20 mL microwave vial was added (3-bromo-quinolin-6-yl)-acetic acid (1 g, 3.77 mmol), 1-methyl-4-pyrazoleboronic acid pinacol ester and 1,4-dioxane (10 mL). Nitrogen was bubbled through the mixture for 10 minutes. Potassium carbonate (1.56 g, 11.3 mmol) was and water (5 mL) were then added, and nitrogen was bubbled through the mixture for a further three minutes. After such time dichlorobis(triphenylphosphine)palladium (138 mg, 0.19 mmol) was added, the vial sealed and heated in a microwave for 1250 seconds at 130° C. The mixture was then filtered through celite, which was washed with water and saturated aqueous sodium bicarbonate. The 1,4-dioxane in the solution was removed under vacuum and the remaining aqueous solution washed with dichloromethane three times. The water layer was acidified to pH 6 using 4M hydrochloric acid and the formed precipitate collected via filtration and dried to return the title compound as an off white solid. (500 MHz, DMSO-d6): ES-MS m/z: 268 (M+H+).

Workup

  1. customNitrogen was bubbled through the mixture for 10 minutes
  2. customnitrogen was bubbled through the mixture for a further three minutes
  3. customthe vial sealed
  4. filtrationThe mixture was then filtered through celite, which
  5. washwas washed with water and saturated aqueous sodium bicarbonate
  6. customThe 1,4-dioxane in the solution was removed under vacuum
  7. washthe remaining aqueous solution washed with dichloromethane three times
  8. filtrationthe formed precipitate collected via filtration
  9. customdried

Sources & evidence

ORD record
ord-c3b1c27517ee44119b0aecf9f1545977
Source dataset
uspto-grants-2011_12
Patent number
US08071581B2

Reaction notes

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