Sulfuric Acid → HCID 12592804, compound

HRID 848803Notes

Reaction equation

HRID 848803 reaction equation
[CH3:1][C:2]1[C:10]([CH3:11])=[C:9]2[C:5]([C:6](=[O:13])[C:7](=[O:12])[NH:8]2)=[CH:4][CH:3]=1.S(OOS([O-])(=O)=O)([O-])(=O)=[O:15].[K+].[K+].S(=O)(=O)(O)O>>[CH3:11][C:10]1[C:9]2[NH:8][C:7](=[O:12])[C:6](=[O:13])[O:15][C:5]=2[CH:4]=[CH:3][C:2]=1[CH3:1]

Participants

4

Reactant 3

HCID 1118Sulfuric AcidHCID 24412Potassium PersulfateHCID 18105116,7-dimethyl-1H-indole-2,3-dione

Product 1

HCID 12592804HCID 12592804, compound

Procedure

35 parts of 6,7-dimethylisatin are introduced into a solution of 60 parts of potassium peroxydisulfate in 400 parts of 98% strength sulfuric acid at from 5° C. to 10° C. The mixture is then stirred for 10-20 minutes, after which it is poured onto ice. The product is filtered off and dried, giving 34 parts of 5,6-dimethyl-2,3-dioxo-1,4-benzoxazine, of melting point 278°-284° C. (with decomposition).

Workup

  1. additionafter which it is poured onto ice
  2. filtrationThe product is filtered off
  3. customdried

Sources & evidence

ORD record
ord-9d44f0c7e34741578db9994b8efc34a5
Source dataset
uspto-grants-1981_10
Patent number
US04297491

Reaction notes

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