Sulfuric Acid → HCID 12592800, compound

HRID 848802Notes

Reaction equation

HRID 848802 reaction equation
[CH3:1][C:2]1[CH:3]=[CH:4][CH:5]=[C:6]2[C:10]=1[NH:9][C:8](=[O:11])[C:7]2=[O:12].S(OOS([O-])(=O)=O)([O-])(=O)=[O:14].[K+].[K+].S(=O)(=O)(O)O>>[CH3:1][C:2]1[C:10]2[NH:9][C:8](=[O:11])[C:7](=[O:12])[O:14][C:6]=2[CH:5]=[CH:4][CH:3]=1

Participants

4

Reactant 3

HCID 1118Sulfuric AcidHCID 143137-MethylisatinHCID 24412Potassium Persulfate

Product 1

HCID 12592800HCID 12592800, compound

Procedure

32.2 parts of 7-methylisatin are introduced into a solution of 56 parts of potassium peroxydisulfate in 450 parts of 92% strength sulfuric acid at from 0° C. to 10° C. The mixture is then stirred for a few minutes, after which it is poured onto ice. The product is filtered off and dried, giving 31.4 parts of 5-methyl-2,3-dioxo-1,4-benzoxazine, of melting point 247°-249° C.

Workup

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

Sources & evidence

ORD record
ord-6145ad4a34154e79bd7621ea684b65b7
Source dataset
uspto-grants-1981_10
Patent number
US04297491

Reaction notes

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