Benzoyl chloride → HCID 22939564, compound

HRID 499357Notes

Reaction equation

HRID 499357 reaction equation
[CH3:1][NH:2][C:3]1[N:8]=[C:7]([C:9]2[S:10][C:11]3[CH:19]=[CH:18][CH:17]=[CH:16][C:12]=3[C:13](=[O:15])[N:14]=2)[CH:6]=[CH:5][CH:4]=1.[C:20](Cl)(=[O:27])[C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1.CN(C)C(=O)C>O>[CH3:1][N:2]([C:3]1[CH:4]=[CH:5][CH:6]=[C:7]([C:9]2[S:10][C:11]3[CH:19]=[CH:18][CH:17]=[CH:16][C:12]=3[C:13](=[O:15])[N:14]=2)[N:8]=1)[C:20](=[O:27])[C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1

Participants

5

Reactant 3

HCID 7412Benzoyl chlorideHCID 31374DimethylacetamideHCID 22939297HCID 22939297, compound

Product 1

HCID 22939564HCID 22939564, compoundYield 47%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Conditions

Temperature
80 °C

Procedure

A mixture of 2-(6-methylamino-2-pyridyl)-4H-1,3-benzothiazine-4-one (0.20 g, 0.74 mmol), benzoyl chloride (0.44 g, 3.1 mmol) and N,N-dimethylacetamide (10 ml) was stirred at 80° C. for 20 hrs. After cooling, the reaction mixture was poured into water and extracted with ethyl acetate. The extract was successively washed with saturated aqueous sodium hydrogen carbonate solution and brine and dried. The solvent was evaporated. The residue was subjected to a silica gel column chromatography and eluted with hexane-ethyl acetate (1:1, v/v). The obtained crystals were recrystallized from ethyl acetate-hexane to give the titled compound (0.13 g, 38%).

Workup

  1. temperatureAfter cooling
  2. extractionextracted with ethyl acetate
  3. washThe extract was successively washed with saturated aqueous sodium hydrogen carbonate solution and brine
  4. customdried
  5. customThe solvent was evaporated
  6. washeluted with hexane-ethyl acetate (1:1
  7. customThe obtained crystals were recrystallized from ethyl acetate-hexane

Sources & evidence

ORD record
ord-81883db529624295a9669c76bc9716eb
Source dataset
uspto-grants-2010_08
Patent number
US07767665B2

Reaction notes

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