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Dimethylformamide → 6-(6-Hydroxyhexyloxy)-2-(2-pyridyl)-4H-1,3-benzothiazine-4-one

HRID 499363
Notes
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Reaction equation

HRID 499363 reaction equation
[OH:1][C:2]1[CH:3]=[CH:4][C:5]2[S:10][C:9]([C:11]3[CH:16]=[CH:15][CH:14]=[CH:13][N:12]=3)=[N:8][C:7](=[O:17])[C:6]=2[CH:18]=1.Br[CH2:20][CH2:21][CH2:22][CH2:23][CH2:24][CH2:25][OH:26].C(=O)([O-])[O-].[K+].[K+].CN(C=O)C>O>[OH:26][CH2:25][CH2:24][CH2:23][CH2:22][CH2:21][CH2:20][O:1][C:2]1[CH:3]=[CH:4][C:5]2[S:10][C:9]([C:11]3[CH:16]=[CH:15][CH:14]=[CH:13][N:12]=3)=[N:8][C:7](=[O:17])[C:6]=2[CH:18]=1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 4

HCID 6228DimethylformamideHCID 11430Potassium CarbonateHCID 779706-Bromo-1-hexanolHCID 229394706-hydroxy-2-(2-pyridyl)-4H-1,3-benzothiazine-4-one

Product 1

HCID 597503816-(6-Hydroxyhexyloxy)-2-(2-pyridyl)-4H-1,3-benzothiazine-4-oneYield 95%

Reagents, catalysts & solvents 1

HCID 962
Water
Solvent

Procedure

A mixture of 6-hydroxy-2-(2-pyridyl)-4H-1,3-benzothiazine-4-one (0.35 g, 1.3 mmol), 6-bromohexanol (1.28 g, 7.0 mmol) and potassium carbonate (0.38 g, 2.7 mmol) and DMF (10 ml) was stirred at room temperature for 24 hrs. The reaction mixture was diluted with water and extracted with ethyl acetate. The extract was washed with water and dried. The solvent was evaporated under reduced pressure. The obtained crystals were recrystallized from tetrahydrofuran-hexane to give the titled compound (0.44 g, 91%).

Workup

  1. extractionextracted with ethyl acetate
  2. washThe extract was washed with water
  3. customdried
  4. customThe solvent was evaporated under reduced pressure
  5. customThe obtained crystals were recrystallized from tetrahydrofuran-hexane

Sources & evidence

ORD record
ord-6e75aaec3b6c473c87fe4d7c98a7c69e
Source dataset
uspto-grants-2010_08
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07767665B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes