Dimethylformamide → tert-Butyl 6-[[4-oxo-2-(2-pyridyl)-4H-1,3-benzothiazin-6-yl]oxy]hexanoate

HRID 499368Notes

Reaction equation

HRID 499368 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][C:25]([O:27][C:28]([CH3:31])([CH3:30])[CH3:29])=[O:26].C(=O)([O-])[O-].[K+].[K+].CN(C=O)C>O>[O:17]=[C:7]1[C:6]2[CH:18]=[C:2]([O:1][CH2:20][CH2:21][CH2:22][CH2:23][CH2:24][C:25]([O:27][C:28]([CH3:29])([CH3:31])[CH3:30])=[O:26])[CH:3]=[CH:4][C:5]=2[S:10][C:9]([C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][N:12]=2)=[N:8]1

Participants

6

Reactant 4

HCID 6228DimethylformamideHCID 11430Potassium CarbonateHCID 11550568Tert-butyl 6-bromohexanoateHCID 229394706-hydroxy-2-(2-pyridyl)-4H-1,3-benzothiazine-4-one

Product 1

HCID 68459181tert-Butyl 6-[[4-oxo-2-(2-pyridyl)-4H-1,3-benzothiazin-6-yl]oxy]hexanoateYield 92.5%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

A mixture of 6-hydroxy-2-(2-pyridyl)-4H-1,3-benzothiazine-4-one (0.50 g, 1.9 mmol), tert-butyl 6-bromohexanoate (1.25 g, 4.9 mmol) and potassium carbonate (0.54 g, 3.9 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. The obtained crystals were recrystallized from ethyl acetate-hexane to give the titled compound (0.75 g, 90%).

Workup

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

Sources & evidence

ORD record
ord-b65f12602c1b45e1a014549724d6ef6c
Source dataset
uspto-grants-2010_08
Patent number
US07767665B2

Reaction notes

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