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

HRID 384629Notes

Reaction equation

HRID 384629 reaction equation
[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]([NH: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]([NH: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]

Participants

6

Reactant 3

HCID 139252945-Aminopyrazine-2-carbonitrileHCID 23676156Sodium t-butoxideHCID 59613428Tert-butyl 4-((2-bromo-5-nitropyridin-4-ylamino)methyl)piperidine-1-carboxylate

Product 1

HCID 66746238Tert-butyl 4-((2-(5-cyanopyrazin-2-ylamino)-5-nitropyridin-4-ylamino)methyl)piperidine-1-carboxylateYield 42%

Reagents, catalysts & solvents 2

HCID 167845palladium(II) acetateCatalystHCID 21735183Dimethylformamide tolueneSolvent

Conditions

Temperature
150 °C

Procedure

Palladium (II) acetate (32 mg, 0.14 mmol) was added to (±)-2,2″-bis(diphenylphosphino)-1,1″-binaphthalene (268 mg, 0.4 mmol) in DMF/toluene (1/1) and the resulting mixture was degassed under a stream of nitrogen gas for 10 minutes. 2-Amino-5-cyanopyrazine (172 mg, 1.43 mmol), sodium tert-butoxide (207 mg, 2.15 mmol) and tert-butyl 4-((2-bromo-5-nitropyridin-4-ylamino)methyl)piperidine-1-carboxylate (595 mg, 1.43 mmol) were added and the mixture was degassed for a further 5 minutes before being heated at 150° C. for 30 minutes using microwave irradiation. The mixture was concentrated in vacuo and partially purified by silica chromatography, eluting with 40% ethyl acetate-hexane, to give 273 mg of tert-butyl 4-((2-(5-cyanopyrazin-2-ylamino)-5-nitropyridin-4-ylamino)methyl)piperidine-1-carboxylate at a purity of 75% which was used without further purification.

Workup

  1. customthe resulting mixture was degassed under a stream of nitrogen gas for 10 minutes
  2. customthe mixture was degassed for a further 5 minutes
  3. custommicrowave irradiation
  4. concentrationThe mixture was concentrated in vacuo
  5. custompartially purified by silica chromatography
  6. washeluting with 40% ethyl acetate-hexane

Sources & evidence

ORD record
ord-e2ccb75c48b9460795fa49620b4c9847
Source dataset
uspto-grants-2013_02
Patent number
US08367658B2

Reaction notes

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