Potassium Nitrate → HCID 178526415, compound

HRID 1089713Notes

Reaction equation

HRID 1089713 reaction equation
[N+:1]([O-:4])([O-])=[O:2].[K+].[OH:6][C:7]1[C:16]([OH:17])=[N:15][C:14]2[C:9](=[CH:10][CH:11]=[C:12]3[N:20]=[N:19][NH:18][C:13]3=2)[N:8]=1>S(=O)(=O)(O)O>[OH:6][C:7]1[C:16]([OH:17])=[N:15][C:14]2[C:9](=[CH:10][C:11]([N+:1]([O-:4])=[O:2])=[C:12]3[N:20]=[N:19][NH:18][C:13]3=2)[N:8]=1

Participants

4

Reactant 2

HCID 24434Potassium Nitrate2×HCID 178517013HCID 178517013, compound

Product 1

HCID 178526415HCID 178526415, compound

Reagents, catalysts & solvents 1

HCID 1118Sulfuric AcidSolvent

Procedure

Finely powdered potassium nitrate (3.1 g, 30.7 mmol) was added to a stirred solution of 7,8-dihydroxy-lH-1,2,3-triazolo[4,5-f]quinoxaline (6.1 g, 30 mmol) in 50 ml of conc. sulfuric acid at 0° C. (ice bath). The mixture was stirred over night at room temperature. Then a further amount of potassium nitrate (3 g) was added with cooling on an ice bath, and stirring was continued for 5 h at room temperature. The mixture was poured into 700 ml of ice/water, and the yellow precipitate was isolated, washed with water, and recrystallized from ethanol giving 5.2 g (70%) of the title compound; m.p.>300° C.; IR (KBr): 3300-2200, 1700 cm-1; 1H-NMR (DMSO-d ): 8.13 (s, lH, ArH), 11-16 (broad, 3H, NH +20H).

Workup

  1. temperaturewith cooling on an ice bath
  2. stirringstirring
  3. customthe yellow precipitate was isolated
  4. washwashed with water
  5. customrecrystallized from ethanol giving 5.2 g (70%) of the title compound

Sources & evidence

ORD record
ord-4e4f9f54386e49dc9c0fa9b1475e7449
Source dataset
uspto-grants-1992_01
Patent number
US05079250

Reaction notes

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