Water → HCID 66728006, compound

HRID 573347Notes

Reaction equation

HRID 573347 reaction equation
[CH2:1]([N:3]1[C:11]2[CH:10]=[N:9][CH:8]=[N:7][C:6]=2[CH:5]=[N:4]1)[CH3:2].C1C(=O)N([Br:19])C(=O)C1.O>CN(C=O)C>[Br:19][C:5]1[C:6]2[N:7]=[CH:8][N:9]=[CH:10][C:11]=2[N:3]([CH2:1][CH3:2])[N:4]=1

Participants

5

Reactant 3

HCID 962WaterHCID 67184N-bromobutanimideHCID 66727973HCID 66727973, compound

Product 1

HCID 66728006HCID 66728006, compoundYield 67.4%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
80 °C

Procedure

To a solution of 1-ethyl-1H-pyrazolo[4,3-d]pyrimidine (300 mg) in DMF (6 mL) was added NBS (721 mg) at room temperature, and the mixture was stirred at 80° C. overnight. The mixture was poured into water and extracted with AcOEt. The organic layer was washed with brine, dried over Na2SO4, filtered and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (AcOEt/hexane) to give the title compound (310 mg). 1H NMR (300 MHz, CDCl3) δ 1.62 (3H, t, J=7.3 Hz), 4.54 (2H, q, J=7.3 Hz), 9.14 (1H, s), 9.17 (1H, s).

Workup

  1. extractionextracted with AcOEt
  2. washThe organic layer was washed with brine
  3. dry with materialdried over Na2SO4
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was purified by silica gel column chromatography (AcOEt/hexane)

Sources & evidence

ORD record
ord-52b6364bb90044b9a7ff82a58ada8642
Source dataset
uspto-grants-2015_05
Patent number
US09029536B2

Reaction notes

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