Triethylamine → 2-[6-(Pentylthio)-2-pyridyl]-4H-1,3-benzothiazine-4-one

HRID 499377Notes

Reaction equation

HRID 499377 reaction equation
[C:1]([O:10]C)(=O)[C:2]1[C:3](=[CH:5][CH:6]=[CH:7][CH:8]=1)[SH:4].[C:12]([C:14]1[CH:19]=[CH:18][CH:17]=[C:16]([S:20][CH2:21][CH2:22][CH2:23][CH2:24][CH3:25])[N:15]=1)#[N:13].C(N(CC)CC)C>C1(C)C=CC=CC=1>[CH2:21]([S:20][C:16]1[N:15]=[C:14]([C:12]2[S:4][C:3]3[CH:5]=[CH:6][CH:7]=[CH:8][C:2]=3[C:1](=[O:10])[N:13]=2)[CH:19]=[CH:18][CH:17]=1)[CH2:22][CH2:23][CH2:24][CH3:25]

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 21009Benzoic acid, 2-mercapto-, methyl esterHCID 229392832-Cyano-6-pentylthiopyridine

Product 1

HCID 597502962-[6-(Pentylthio)-2-pyridyl]-4H-1,3-benzothiazine-4-oneYield 44.2%

Reagents, catalysts & solvents 1

HCID 1140TolueneSolvent

Procedure

A mixture of methyl thiosalicylate (1.21 g, 7.2 mmol), 2-cyano-6-pentylthiopyridine (1.48 g, 7.2 mmol), triethylamine (1.5 ml, 10.8 mmol) and toluene (30 ml) was refluxed for 48 hrs. The reaction mixture was concentrated under reduced pressure to give the precipitated crystals, which were recrystallized from ethyl acetate-hexane to give the titled compound (1.09 g, 44%).

Workup

  1. temperaturewas refluxed for 48 hrs
  2. concentrationThe reaction mixture was concentrated under reduced pressure
  3. customto give the precipitated crystals, which
  4. customwere recrystallized from ethyl acetate-hexane

Sources & evidence

ORD record
ord-1e8ba7730381450b9ecd1126e6fc4be1
Source dataset
uspto-grants-2010_08
Patent number
US07767665B2

Reaction notes

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