Cesium carbonate → Methyl 2-(2-chloropyrimidin-5-ylamino)-5-cyclopropylbenzoate

HRID 42004Notes

Reaction equation

HRID 42004 reaction equation
[NH2:1][C:2]1[CH:11]=[CH:10][C:9]([CH:12]2[CH2:14][CH2:13]2)=[CH:8][C:3]=1[C:4]([O:6][CH3:7])=[O:5].Br[C:16]1[CH:17]=[N:18][C:19]([Cl:22])=[N:20][CH:21]=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+]>O1CCOCC1.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].C(OCC)(=O)C.O>[Cl:22][C:19]1[N:20]=[CH:21][C:16]([NH:1][C:2]2[CH:11]=[CH:10][C:9]([CH:12]3[CH2:14][CH2:13]3)=[CH:8][C:3]=2[C:4]([O:6][CH3:7])=[O:5])=[CH:17][N:18]=1

Participants

9

Reactant 4

HCID 10796Cesium carbonateHCID 6066655-Bromo-2-chloropyrimidineHCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)HCID 13052309Methyl 2-amino-5-cyclopropylbenzoate

Product 1

HCID 86657256Methyl 2-(2-chloropyrimidin-5-ylamino)-5-cyclopropylbenzoate

Reagents, catalysts & solvents 4

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 962WaterSolventHCID 8857Ethyl AcetateSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
100 °C

Procedure

In a schlenck tube, a mixture of methyl 2-amino-5-cyclopropylbenzoate (described in Intermediate 8 (step A) (26.15 mmol, 5 g), 5-bromo-2-chloropyrimidine (26.93 mmol, 5.21 g), Xantphos (1.07 mmol, 0.6 g), Pd2(dba)3 (1.07 mmol, 0.6 g) and Cs2CO3 (36.65 mmol, 11.9 g) in dioxane (210 ml) was heated at 100° C. overnight. Water and ethyl acetate were added to the reaction crude. The aqueous phase was extracted again with more ethyl acetate. The organic phase was washed with water and brine, dried, filtered and concentrated in vacuo. The crude mixture was purified by reverse chromatography (Water: MeOH/AcN 1:1 from 0% to 100%) affording 6 g (60% of yield) of the expected product.

Workup

  1. extractionThe aqueous phase was extracted again with more ethyl acetate
  2. washThe organic phase was washed with water and brine
  3. customdried
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. customThe crude mixture was purified by reverse chromatography (Water: MeOH/AcN 1:1 from 0% to 100%)
  7. customaffording

Sources & evidence

ORD record
ord-185bb4a960824d82a53d420aa849be0a
Source dataset
uspto-grants-2013_09
Patent number
US08536165B2

Reaction notes

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