Potassium Carbonate → HCID 67331282, compound

HRID 1896757Notes

Reaction equation

HRID 1896757 reaction equation
Br[C:2]1[CH:3]=[CH:4][C:5]2[O:9][C:8]([C:10]3[CH:15]=[CH:14][C:13]([CH3:16])=[CH:12][CH:11]=3)=[N:7][C:6]=2[CH:17]=1.[CH3:18][O:19][C:20]1[CH:25]=[CH:24][C:23](B(O)O)=[CH:22][CH:21]=1.C(=O)([O-])[O-].[K+].[K+]>O1CCOCC1.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>[CH3:18][O:19][C:20]1[CH:25]=[CH:24][C:23]([C:2]2[CH:3]=[CH:4][C:5]3[O:9][C:8]([C:10]4[CH:15]=[CH:14][C:13]([CH3:16])=[CH:12][CH:11]=4)=[N:7][C:6]=3[CH:17]=2)=[CH:22][CH:21]=1

Participants

7

Reactant 3

HCID 11430Potassium CarbonateHCID 201262(4-Methoxyphenyl)boronic acidHCID 53376823HCID 53376823, compound

Product 1

HCID 67331282HCID 67331282, compoundYield 38.1%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolvent2×HCID 312751,4-DioxaneSolvent

Conditions

Temperature
150 °C

Procedure

To a solution of 5-bromo-2-p-tolylbenzo[d]oxazole (146.1 mg, 0.50 mmol) in dioxane (1.5 mL) was added water (0.5 mL), 4-methoxyphenylboronic acid (114 mg, 0.75 mmol), potassium carbonate (138 mg, 1.00 mmol) and tetrakis(triphenylphosphine)palladium(0) (3 mg). The resulting suspension was heated in the microwave at 150° C. for 15 min. After cooling, the reaction was diluted with water and extracted with ethyl acetate. The combined organic layers were dried over anhydrous MgSO4 and evaporated. The resulting solid was purified by column chromatography eluting with ethyl acetate/hexanes 1:99 v/v to afford 60 mg (38%) of the title compound (LCMS RT=9.18 min, MH+ 316.1)

Workup

  1. temperatureAfter cooling
  2. extractionextracted with ethyl acetate
  3. dry with materialThe combined organic layers were dried over anhydrous MgSO4
  4. customevaporated
  5. customThe resulting solid was purified by column chromatography
  6. washeluting with ethyl acetate/hexanes 1:99 v/v

Sources & evidence

ORD record
ord-2d081b4b71f44a7183f8d73633a10cc8
Source dataset
uspto-grants-2013_08
Patent number
US08518980B2

Reaction notes

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