Pyridine → HCID 86636453, compound

HRID 1664417Notes

Reaction equation

HRID 1664417 reaction equation
[CH2:1]([NH:8][C:9]1[N:17]=[C:16]([Cl:18])[CH:15]=[CH:14][C:10]=1[C:11]([NH2:13])=O)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.N1C=CC=CC=1.O=P(Cl)(Cl)Cl.[OH-].[Na+]>C(#N)C.CCOC(C)=O>[CH2:1]([NH:8][C:9]1[N:17]=[C:16]([Cl:18])[CH:15]=[CH:14][C:10]=1[C:11]#[N:13])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

7

Reactant 4

HCID 1049PyridineHCID 14798Sodium HydroxideHCID 24813Phosphorus oxychlorideHCID 57969191HCID 57969191, compound

Product 1

HCID 86636453HCID 86636453, compoundYield 42%

Reagents, catalysts & solvents 2

HCID 6342AcetonitrileSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
55 °C

Procedure

To a solution of 2-benzylamino-6-chloro-nicotinamide (3, 1.71 g, 6.6 mmol) in acetonitrile (anhydrous, 80 mL) were added pyridine (4.26 mL, 52.7 mmol) and POCl3 (2.41 mL, 264 mmol). The reaction was heated at 55° C. for 3 hours. After cooling to room temperature, NaOH solution (10% aq., 30 mL) was slowly added till pH 9. EtOAc (200 mL) was added and the layers separated. The aqueous layer was extracted with EtOAc (2×200 mL). The combined organic layer was dried over MgSO4, filtered, and evaporated in vacuo. Purification was accomplished by silica gel chromatography, eluting with 2%-20% EtOAc/hexanes gradient, to afford 0.66 g (42% yield) of the title compound.

Workup

  1. temperatureAfter cooling to room temperature
  2. customthe layers separated
  3. extractionThe aqueous layer was extracted with EtOAc (2×200 mL)
  4. dry with materialThe combined organic layer was dried over MgSO4
  5. filtrationfiltered
  6. customevaporated in vacuo
  7. customPurification
  8. washeluting with 2%-20% EtOAc/hexanes gradient

Sources & evidence

ORD record
ord-cf04181132254536a233b9a277f54d91
Source dataset
uspto-grants-2011_10
Patent number
US08039450B2

Reaction notes

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