Potassium Phosphate, Tribasic → 2-(4-Methoxy-2,6-dimethylphenyl)-5-morpholinopyridin-3-amine

HRID 1431587Notes

Reaction equation

HRID 1431587 reaction equation
Cl[C:2]1[C:7]([NH2:8])=[CH:6][C:5]([N:9]2[CH2:14][CH2:13][O:12][CH2:11][CH2:10]2)=[CH:4][N:3]=1.[CH3:15][O:16][C:17]1[CH:22]=[C:21]([CH3:23])[C:20](B(O)O)=[C:19]([CH3:27])[CH:18]=1.C1(P(C2CCCCC2)C2CCCCC2)CCCCC1.[O-]P([O-])([O-])=O.[K+].[K+].[K+]>C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd].O.O1CCOCC1>[CH3:15][O:16][C:17]1[CH:22]=[C:21]([CH3:23])[C:20]([C:2]2[C:7]([NH2:8])=[CH:6][C:5]([N:9]3[CH2:14][CH2:13][O:12][CH2:11][CH2:10]3)=[CH:4][N:3]=2)=[C:19]([CH3:27])[CH:18]=1

Participants

8

Reactant 4

HCID 62657Potassium Phosphate, TribasicHCID 75806TricyclohexylphosphineHCID 3716303(2,6-Dimethyl-4-methoxyphenyl)boronic acidHCID 596310392-Chloro-5-morpholinopyridin-3-amine

Product 1

HCID 596311642-(4-Methoxy-2,6-dimethylphenyl)-5-morpholinopyridin-3-amine

Reagents, catalysts & solvents 3

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 962WaterSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
90 °C

Procedure

2-Chloro-5-morpholinopyridin-3-amine (62 mg, 0.29 mmol), 4-methoxy-2,6-dimethylphenylboronic acid (0.07 g, 0.39 mmol), tricyclohexylphosphine (12 mg, 0.042 mmol), and tris(dibenzylideneacetone)dipalladium (0) (19 mg, 0.02 mmol) were added to a flask then degassed and backfilled with argon. To the flask, 1,4-dioxane (3 mL) and aq. 1.3M potassium phosphate tribasic (0.67 mL, 0.87 mmol) were added by syringe. The resulting reaction was heated to 90° C. and monitored with TLC and LC-MS. After 19 h, the reaction was cooled to rt then poured into water. After extracting twice with EtOAc and twice with DCM, the combined organic extractions were dried over anhydrous magnesium sulfate. After filtration and concentration, the residue was purified on silica gel (0-30% of a premixed solution of 89:9:1 DCM:MeOH:ammonium hydroxide in DCM) to afford a light yellow solid as 2-(4-methoxy-2,6-dimethylphenyl)-5-morpholinopyridin-3-amine. 1H NMR (500 MHz, CDCl3) δ ppm 7.75 (1H, br. s.), 6.75 (3H, m), 3.95 (4H, m), 3.85 (3H, m), 3.54 (2H, br. s.), 3.28 (4H, m), 2.04 (6H, s). Mass Spectrum (pos.) m/e: 314.2 (M+1).

Workup

  1. customthen degassed
  2. customThe resulting reaction
  3. temperaturethe reaction was cooled to rt
  4. extractionAfter extracting twice with EtOAc and twice with DCM
  5. extractionthe combined organic extractions
  6. dry with materialwere dried over anhydrous magnesium sulfate
  7. filtrationAfter filtration and concentration
  8. customthe residue was purified on silica gel (0-30% of a premixed solution of 89:9:1 DCM:MeOH:ammonium hydroxide in DCM)

Sources & evidence

ORD record
ord-08305a0d110c4588a5c3ba8bf9ba8859
Source dataset
uspto-grants-2015_01
Patent number
US08940724B2

Reaction notes

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