Triethylamine → 6-(6-ethoxypyridin-3-yl)-1H-pyrrolo[2,3-b]pyridine-3-carbonitrile

HRID 1025627Notes

Reaction equation

HRID 1025627 reaction equation
C([N:4]1[C:8]2=[N:9][C:10](Br)=[CH:11][CH:12]=[C:7]2[C:6]([C:14]#[N:15])=[CH:5]1)(=O)C.C(N(CC)CC)C.CC(C1C=C(C(C)C)C(C2C=CC=CC=2P(C2CCCCC2)C2CCCCC2)=C(C(C)C)C=1)C.[CH2:57]([O:59][C:60]1[CH:65]=[CH:64][C:63](B(O)O)=[CH:62][N:61]=1)[CH3:58]>O1CCOCC1>[CH2:57]([O:59][C:60]1[N:61]=[CH:62][C:63]([C:10]2[N:9]=[C:8]3[NH:4][CH:5]=[C:6]([C:14]#[N:15])[C:7]3=[CH:12][CH:11]=2)=[CH:64][CH:65]=1)[CH3:58]

Participants

6

Reactant 4

HCID 8471TriethylamineHCID 111557942-Dicyclohexylphosphino-2',4',6'-triisoprophylbiphenylHCID 120122372-Ethoxypyridine-5-boronic AcidHCID 747882791-Acetyl-6-bromo-1H-pyrrolo[2,3-b]pyridine-3-carbonitrile

Product 1

HCID 710085446-(6-ethoxypyridin-3-yl)-1H-pyrrolo[2,3-b]pyridine-3-carbonitrileYield 67%

Reagents, catalysts & solvents 1

HCID 312751,4-DioxaneSolvent

Conditions

Temperature
100 °C

Procedure

In a 100 mL round-bottomed flask, 1-acetyl-6-bromo-1H-pyrrolo[2,3-b]pyridine-3-carbonitrile (250 mg, 947 μmol, Eq: 1.00), triethylamine (575 mg, 792 μl, 5.68 mmol, Eq: 6) and X-PHOS (181 mg, 379 μmol, Eq: 0.40) were combined with dioxane (25 ml) to give a colorless solution. [1,1′-bis(diphenylphosphino)ferrocene]dichloropaladium(II) (173 mg, 237 μmol, Eq: 0.25) and 2-ethoxy-5-pyridineboronic acid (205 mg, 1.23 mmol, Eq: 1.3) were added and the resultant mixture was degassed for 5 minutes under Nitrogen. The reaction mixture was heated to 100° C. and stirred for O/N h. The reaction mixture was poured into 50 mL H2O and extracted with EtOAc (3×50 mL). The organic layers were dried over MgSO4 and concentrated in vacuo. The crude material was purified by flash chromatography (silica gel, 40 g, 20% to 30% EtOAc in hexanes) to give 6-(6-ethoxypyridin-3-yl)-1H-pyrrolo[2,3-b]pyridine-3-carbonitrile (167 mg, 67%).

Workup

  1. customto give a colorless solution
  2. customthe resultant mixture was degassed for 5 minutes under Nitrogen
  3. additionThe reaction mixture was poured into 50 mL H2O
  4. extractionextracted with EtOAc (3×50 mL)
  5. dry with materialThe organic layers were dried over MgSO4
  6. concentrationconcentrated in vacuo
  7. customThe crude material was purified by flash chromatography (silica gel, 40 g, 20% to 30% EtOAc in hexanes)

Sources & evidence

ORD record
ord-20a0bbc04c5644e8a0dee349d7c1d117
Source dataset
uspto-grants-2014_05
Patent number
US08729078B2

Reaction notes

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