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

HRID 499379Notes

Reaction equation

HRID 499379 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][CH:23]([CH3:25])[CH3:24])[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][CH:23]([CH3:25])[CH3:24]

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 21009Benzoic acid, 2-mercapto-, methyl esterHCID 229393372-Cyano-6-isopentylthiopyridine

Product 1

HCID 229395222-[6-(Isoamylthio)-2-pyridyl]-4H-1,3-benzothiazine-4-oneYield 26%

Reagents, catalysts & solvents 1

HCID 1140TolueneSolvent

Procedure

A mixture of methyl thiosalicylate (1.21 g, 7.2 mmol), 2-cyano-6-isopentylthiopyridine (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 (0.64 g, 26%).

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-423a5a05fe124b24b8461e5885033767
Source dataset
uspto-grants-2010_08
Patent number
US07767665B2

Reaction notes

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