Hydrochloric Acid → HCID 14988435, compound

HRID 1031917Notes

Reaction equation

HRID 1031917 reaction equation
[Br:1][C:2]1[CH:3]=[C:4]2[S:9][CH2:8][CH2:7][N:6]3C(=O)[C:11](=[O:14])[C:12]([CH:13]=1)=[C:5]23.[OH-:16].[Na+].OO.Cl>O>[Br:1][C:2]1[CH:3]=[C:4]2[S:9][CH2:8][CH2:7][NH:6][C:5]2=[C:12]([C:11]([OH:14])=[O:16])[CH:13]=1

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 784Hydrogen PeroxideHCID 14798Sodium HydroxideHCID 14988434HCID 14988434, compound

Product 1

HCID 14988435HCID 14988435, compoundYield 92.3%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

To a suspension of 8-bromo-2,3-dihydropyrrolo[1,2,3-de]-1,4-benzothiazine-5,6-dione (4.6 g) in water (50 ml) was added 2 N sodium hydroxide solution (30 ml) and dissolved. To the solution was added 30% hydrogen peroxide solution (4 ml) at 15° C. After stirring for 30 minutes, the mixture was brought to slightly acidic by the addition of concentrated hydrochloric acid. The resulting crystals were collected by filtration, washed with water and dried to give the title compound (4.1 g, 92.3%) which was recrystallized from ethanol as pale yellow needles, mp 205°-206° C. (decompd.).

Workup

  1. dissolutiondissolved
  2. filtrationThe resulting crystals were collected by filtration
  3. washwashed with water
  4. customdried

Sources & evidence

ORD record
ord-cb4eb5621105464584a230af4e249707
Source dataset
uspto-grants-1990_09
Patent number
US04956372

Reaction notes

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