Sulfuric Acid → 1,2,3,4-Tetrahydro-2,3-dioxo-6-quinoxalinesulfonic acid

HRID 2286691Notes

Reaction equation

HRID 2286691 reaction equation
[NH:1]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[NH:4][C:3](=[O:11])[C:2]1=[O:12].[S:13](=O)(=[O:16])([OH:15])[OH:14]>>[O:12]=[C:2]1[C:3](=[O:11])[NH:4][C:5]2[C:10](=[CH:9][CH:8]=[C:7]([S:13]([OH:16])(=[O:15])=[O:14])[CH:6]=2)[NH:1]1

Participants

3

Reactant 2

HCID 1118Sulfuric Acid2×HCID 274912,3-Dihydroxyquinoxaline

Product 1

HCID 37140101,2,3,4-Tetrahydro-2,3-dioxo-6-quinoxalinesulfonic acid

Procedure

2,3(1H, 4H)-Quinoxalinedione (10 g) was added portionwise to a stirred mixture of 65% fuming sulphuric acid (10 ml) and conc. sulphuric acid (40 ml) at room temperature. After stirring for 30 minutes at 55°-60°, the mixture was worked up as in example 1 to give the hydrated crystalline product (15.3 g, mp. >300°).

Sources & evidence

ORD record
ord-6e4ece0e3a2b41ababe88c9eb59223f5
Source dataset
uspto-grants-1981_05
Patent number
US04267325

Reaction notes

Loading…