Potassium Phosphate, Tribasic → HCID 58486769, compound

HRID 874612Notes

Reaction equation

HRID 874612 reaction equation
Br[C:2]1[C:10]([CH3:11])=[CH:9][C:5]2[N:6]=[CH:7][O:8][C:4]=2[CH:3]=1.[NH2:12][C:13]1[CH:18]=[CH:17][C:16](B2OC(C)(C)C(C)(C)O2)=[CH:15][N:14]=1.[O-]P([O-])([O-])=O.[K+].[K+].[K+]>C(#N)C.O1CCOCC1.O.CC(P(C(C)(C)C)C1C=CC(N(C)C)=CC=1)(C)C.CC(P(C(C)(C)C)C1C=CC(N(C)C)=CC=1)(C)C.Cl[Pd]Cl>[CH3:11][C:10]1[C:2]([C:16]2[CH:17]=[CH:18][C:13]([NH2:12])=[N:14][CH:15]=2)=[CH:3][C:4]2[O:8][CH:7]=[N:6][C:5]=2[CH:9]=1

Participants

8

Reactant 3

HCID 62657Potassium Phosphate, TribasicHCID 27565555-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-amineHCID 58487139HCID 58487139, compound

Product 1

HCID 58486769HCID 58486769, compoundYield 82.5%

Reagents, catalysts & solvents 4

HCID 11714597Bis(di-tert-butyl(4-dimethylaminophenyl)phosphine)dichloropalladium(II)CatalystHCID 962WaterSolventHCID 6342AcetonitrileSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
85 °C

Procedure

A mixture of 6-bromo-5-methybenzoxazole (43) (91 mg, 0.43 mmol), 2-aminopyridine-5-boronic acid pinacol ester (11) (220 mg, 1 mmol), Bis(di-tert-butyl(4-dimethylaminophenyl)phosphine)dichloropalladium (II) (A-Phos) (30 mg) and K3PO4 (127 mg, 0.6 mmol) in 1.5 ml ACN, 1.5 ml dioxane, 0.5 ml H2O was bubbled with argon before heated at 85° C. for 2 h. After cooling down to r.t., the reaction mixture was taken up in EA, washed with aq. NaHCO3 and brine, dried over Na2SO4, concentrated to dryness. The resulting red solid was dissolved in DCM and subjected to silica gel column purification using 0-100% B (A: hexane; B: EA) to furnish 79.9 mg 5-(5-methylbenzoxazol-6-yl)-2-pyridylamine (44) as orange solid (yield: 82.5%, purity>90%)

Workup

  1. customwas bubbled with argon
  2. temperatureAfter cooling down to r.t.
  3. washwashed with aq. NaHCO3 and brine
  4. dry with materialdried over Na2SO4
  5. concentrationconcentrated to dryness
  6. dissolutionThe resulting red solid was dissolved in DCM
  7. customsubjected to silica gel column purification

Sources & evidence

ORD record
ord-30cce5f6a06e40658d40823a7150b5b6
Source dataset
uspto-grants-2015_03
Patent number
US08980629B2

Reaction notes

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