Cesium carbonate → 5-Bromo-3-(2-ethylpyrimidin-4-ylamino)-1-methylpyridin-2(1H)-one

HRID 1411866Notes

Reaction equation

HRID 1411866 reaction equation
[CH2:1]([C:3]1[N:8]=[C:7]([NH2:9])[CH:6]=[CH:5][N:4]=1)[CH3:2].Br[C:11]1[C:12](=[O:19])[N:13]([CH3:18])[CH:14]=[C:15]([Br:17])[CH:16]=1.CC1(C)C2C(=C(P(C3C=CC=CC=3)C3C=CC=CC=3)C=CC=2)OC2C(P(C3C=CC=CC=3)C3C=CC=CC=3)=CC=CC1=2.C([O-])([O-])=O.[Cs+].[Cs+]>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].O1CCOCC1>[Br:17][C:15]1[CH:16]=[C:11]([NH:9][C:7]2[CH:6]=[CH:5][N:4]=[C:3]([CH2:1][CH3:2])[N:8]=2)[C:12](=[O:19])[N:13]([CH3:18])[CH:14]=1

Participants

7

Reactant 4

HCID 10796Cesium carbonateHCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)HCID 36143503,5-Dibromo-1-methylpyridin-2(1H)-oneHCID 139252962-Ethyl-4-pyrimidinamine

Product 1

HCID 866844245-Bromo-3-(2-ethylpyrimidin-4-ylamino)-1-methylpyridin-2(1H)-oneYield 50%

Reagents, catalysts & solvents 2

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

Conditions

Temperature
100 °C

Procedure

A 100-mL single-neck round-bottomed flask equipped with a magnetic stirrer and a reflux condenser was charged with 229a (246 mg, 2.0 mmol), 3,5-dibromo-1-methylpyridin-2(1H)-one (534 mg, 2.0 mmol), Pd2(dba)3 (182 mg, 0.20 mmol), XantPhos (231 mg, 0.40 mmol), Cs2CO3 (1.30 g, 4.0 mmol), and 1,4-dioxane (20 mL). After three cycles of vacuum/argon flush, the mixture was heated at 100° C. for 4 h. It was then cooled to room temperature and filtered. The filtrate was concentrated under reduced pressure and the resulting residue was purified by silica-gel column chromatography eluting with 40:1 dichloromethane/methanol to afford 229b as off-white solid (308 mg, 50%). MS-ESI: [M+H]+ 309.1

Workup

  1. customA 100-mL single-neck round-bottomed flask equipped with a magnetic stirrer and a reflux condenser
  2. customAfter three cycles of vacuum/argon flush
  3. temperatureIt was then cooled to room temperature
  4. filtrationfiltered
  5. concentrationThe filtrate was concentrated under reduced pressure
  6. customthe resulting residue was purified by silica-gel column chromatography
  7. washeluting with 40:1 dichloromethane/methanol

Sources & evidence

ORD record
ord-f6b693d080a548bb832ee8664ba3534b
Source dataset
uspto-grants-2014_12
Patent number
US08921353B2

Reaction notes

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