4,5-Diethoxalylaminobenzofurazan → HCID 178517014, compound

HRID 345397Notes

Reaction equation

HRID 345397 reaction equation
C([NH:8][C:9]1[C:14]2=[N:15][O:16][N:17]=[C:13]2[CH:12]=[CH:11][C:10]=1[NH:18][C:19]([C:21]([O:23]CC)=O)=[O:20])(C(OCC)=O)=O>Cl>[OH:20][C:19]1[C:21]([OH:23])=[N:8][C:9]2[C:14]3=[N:15][O:16][N:17]=[C:13]3[CH:12]=[CH:11][C:10]=2[N:18]=1

Participants

3

Reactant 1

HCID 867443944,5-Diethoxalylaminobenzofurazan

Product 1

HCID 178517014HCID 178517014, compoundYield 97%

Reagents, catalysts & solvents 1

HCID 313Hydrochloric AcidSolvent

Conditions

Temperature
0 °C

Procedure

A mixture of 2,5 g (7,1 mmol) 4,5-diethoxalylaminobenzofurazan and 20 ml 1N hydrochloric acid was refluxed for 3 h. After cooling to 0° C., the precipitate was filtered off and washed with water to give 1,4 g (97%) 7,8-dihydroxy-1,2,5-oxadiazolo(3,4-f)quinoxaline, m.p.>300° C. NMR (DMSO-d6): 12,8 (1H, broad s), 12.3 (1H, broad s), 7.70 (1H,d), 7.37 (1H,d).

Workup

  1. temperaturewas refluxed for 3 h
  2. filtrationthe precipitate was filtered off
  3. washwashed with water

Sources & evidence

ORD record
ord-a90719742c694cf386afe949a82490c3
Source dataset
uspto-grants-1991_10
Patent number
US05057516

Reaction notes

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