Potassium Carbonate → 2'-Hydroxy-7'-(5-pyrimidinyl)spiro[1,3-oxazole-4,9'-xanthen]-2-amine

HRID 1970339Notes

Reaction equation

HRID 1970339 reaction equation
Br[C:2]1[CH:15]=[CH:14][C:13]2[O:12][C:11]3[C:6](=[CH:7][C:8]([OH:16])=[CH:9][CH:10]=3)[C:5]3([CH2:20][O:19][C:18]([NH2:21])=[N:17]3)[C:4]=2[CH:3]=1.[N:22]1[CH:27]=[C:26](B(O)O)[CH:25]=[N:24][CH:23]=1.C(=O)([O-])[O-].[K+].[K+]>C1COCC1.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>[OH:16][C:8]1[CH:9]=[CH:10][C:11]2[O:12][C:13]3[C:4](=[CH:3][C:2]([C:26]4[CH:27]=[N:22][CH:23]=[N:24][CH:25]=4)=[CH:15][CH:14]=3)[C:5]3([CH2:20][O:19][C:18]([NH2:21])=[N:17]3)[C:6]=2[CH:7]=1

Participants

6

Reactant 3

HCID 11430Potassium CarbonateHCID 2795193(Pyrimidin-5-yl)boronic acidHCID 584661592'-Bromo-7'-hydroxyspiro[1,3-oxazole-4,9'-xanthen]-2-amine

Product 1

HCID 584661412'-Hydroxy-7'-(5-pyrimidinyl)spiro[1,3-oxazole-4,9'-xanthen]-2-amine

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 8028TetrahydrofuranSolvent

Procedure

A 150-mL pressure vessel was charged with 2′-bromo-7′-hydroxyspiro[1,3-oxazole-4,9′-xanthen]-2-amine (845 mg, 2434 μmol) in THF (24 mL), pyrimidin-5-ylboronic acid (754 mg, 6085 μmol), tetrakis(triphenylphosphine)palladium(0) (281 mg, 243 μmol), and potassium carbonate (10.1 mL of a 1.2 M aqueous solution, 12.1 mmol). The vessel was sealed and placed in a 100° C. oil bath at for 4 h. The reaction mixture was cooled to RT and partitioned between EtOAc (50 mL) and water (50 mL). The aqueous layer was extracted with EtOAc (50 mL), and the combined organic extracts were dried over sodium sulfate, filtered, and evaporated. The crude material was purified by chromatography on silica gel (eluting with 30-100% of a 90:10:1 DCM/MeOH/NH4OH solution in DCM) to give 2′-hydroxy-7′-(5-pyrimidinyl)spiro[1,3-oxazole-4,9′-xanthen]-2-amine as an off-white solid.

Workup

  1. customThe vessel was sealed
  2. customplaced in a 100° C.
  3. customat for 4 h
  4. custompartitioned between EtOAc (50 mL) and water (50 mL)
  5. extractionThe aqueous layer was extracted with EtOAc (50 mL)
  6. dry with materialthe combined organic extracts were dried over sodium sulfate
  7. filtrationfiltered
  8. customevaporated
  9. customThe crude material was purified by chromatography on silica gel (eluting with 30-100% of a 90:10:1 DCM/MeOH/NH4OH solution in DCM)

Sources & evidence

ORD record
ord-a55e1b0710c54ae0897c2bc1a2d42363
Source dataset
uspto-grants-2013_04
Patent number
US08426447B2

Reaction notes

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