5-Aminopyrazine-2-carbonitrile → Tert-butyl 4-((2-(5-cyanopyrazin-2-ylamino)-5-nitropyridin-4-yloxy)methyl)piperidine-1-carboxylate

HRID 556810Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 556810
[NH2:1][C:2]1[CH:7]=[N:6][C:5]([C:8]#[N:9])=[CH:4][N:3]=1.CC(C)([O-])C.[Na+].Br[C:17]1[CH:22]=[C:21]([O:23][CH2:24][CH:25]2[CH2:30][CH2:29][N:28]([C:31]([O:33][C:34]([CH3:37])([CH3:36])[CH3:35])=[O:32])[CH2:27][CH2:26]2)[C:20]([N+:38]([O-:40])=[O:39])=[CH:19][N:18]=1>CN(C=O)C.C1(C)C=CC=CC=1.C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[C:8]([C:5]1[N:6]=[CH:7][C:2]([NH:1][C:17]2[CH:22]=[C:21]([O:23][CH2:24][CH:25]3[CH2:30][CH2:29][N:28]([C:31]([O:33][C:34]([CH3:35])([CH3:37])[CH3:36])=[O:32])[CH2:27][CH2:26]3)[C:20]([N+:38]([O-:40])=[O:39])=[CH:19][N:18]=2)=[N:3][CH:4]=1)#[N:9]

Komponenten

6

Edukt 3

HCID 139252945-Aminopyrazine-2-carbonitrileHCID 23676156Sodium t-butoxideHCID 59613339Tert-butyl 4-((2-bromo-5-nitropyridin-4-yloxy)methyl)piperidine-1-carboxylate

Produkt 1

HCID 59613322Tert-butyl 4-((2-(5-cyanopyrazin-2-ylamino)-5-nitropyridin-4-yloxy)methyl)piperidine-1-carboxylateAusbeute 124,2 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 167845palladium(II) acetateKatalysatorHCID 21735183Dimethylformamide tolueneLösungsmittel

Versuchsvorschrift

Palladium (II) acetate (14.7 mg, 0.07 mmol) was added to (±)-2,2″-bis(diphenylphosphino)-1,1″-binaphthalene (123 mg, 0.2 mmol) in DMF-toluene (1:1, 5 mL) and the mixture was degassed for 10 minutes under a stream of nitrogen gas. 2-Amino-5-cyanopyrazine (95 mg, 0.79 mmol), sodium-t-butoxide (76 mg, 0.79 mmol) and tert-butyl 4-((2-bromo-5-nitropyridin-4-yloxy)methyl)piperidine-1-carboxylate (273 mg, 0.67 mmol) were added and the mixture was degassed for a further 5 minutes before stirring at room temperature for 2 hours. The mixture was partitioned between ethyl acetate and water and the aqueous phase was extracted with ethyl acetate. The combined organic layers were washed with water and brine, then dried (Na2SO4) and concentrated to give crude tert-butyl 4-((2-(5-cyanopyrazin-2-ylamino)-5-nitropyridin-4-yloxy)methyl)piperidine-1-carboxylate (379 mg) which was used without further purification.

Aufarbeitung

  1. customthe mixture was degassed for 10 minutes under a stream of nitrogen gas
  2. customthe mixture was degassed for a further 5 minutes
  3. customThe mixture was partitioned between ethyl acetate and water
  4. extractionthe aqueous phase was extracted with ethyl acetate
  5. washThe combined organic layers were washed with water and brine
  6. dry with materialdried (Na2SO4)
  7. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-c12855267f0d43d083113120b4842cec
Quelldatensatz
uspto-grants-2011_11
Patentnummer
US08058045B2

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