5-Bromoisatoic Anhydride → 6-bromoquinazolin-4-ol

HRID 1511328Notes

Reaction equation

HRID 1511328 reaction equation
[Br:1][C:2]1[CH:13]=[C:6]2[C:7](O[C:10](=O)[NH:11][C:5]2=[CH:4][CH:3]=1)=[O:8].C([O-])(=O)C.C(N)=[NH2+:19]>CC(O)C>[Br:1][C:2]1[CH:13]=[C:6]2[C:5](=[CH:4][CH:3]=1)[N:11]=[CH:10][NH:19][C:7]2=[O:8]

Participants

4

Reactant 2

HCID 2885615-Bromoisatoic AnhydrideHCID 10285782Iminomethanaminium acetate

Product 1

HCID 1354449056-bromoquinazolin-4-ol

Reagents, catalysts & solvents 1

HCID 3776IsopropanolSolvent

Procedure

A solution of 5-bromoisatoic anhydride (5.0 g, 21 mmol) and formamidinium acetate (2.2 g, 21 mmol) in 60 mL of i-PrOH was heated at reflux for 10 hours. The reaction mixture was cooled to rt and the white solid was collected by filtration. The white solid was washed with small amount of i-PrOH and dried in air to give desired product 6-bromoquinazolin-4(3H)-one. MS (ESI, pos. ion) m/z: 224.9 (M+1).

Workup

  1. temperatureat reflux for 10 hours
  2. filtrationthe white solid was collected by filtration
  3. washThe white solid was washed with small amount of i-PrOH
  4. customdried in air

Sources & evidence

ORD record
ord-d42f1f3754a1471daad8e58e5146f6aa
Source dataset
uspto-grants-2012_07
Patent number
US08212041B2

Reaction notes

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