Methyl iodide → 5-Fluoro-2-(methylthio)benzo[d]thiazole

HRID 220374Notes

Reaction equation

HRID 220374 reaction equation
[F:1][C:2]1[CH:3]=[CH:4][C:5]2[S:9][C:8]([SH:10])=[N:7][C:6]=2[CH:11]=1.[H-].[Na+].I[CH3:15]>C1COCC1.C(OCC)(=O)C>[F:1][C:2]1[CH:3]=[CH:4][C:5]2[S:9][C:8]([S:10][CH3:15])=[N:7][C:6]=2[CH:11]=1

Participants

6

Reactant 3

HCID 6328Methyl iodideHCID 24758Sodium hydrideHCID 178419066HCID 178419066, compound

Product 1

HCID 552527075-Fluoro-2-(methylthio)benzo[d]thiazoleYield 110.3%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of 5-fluoro-2-mercaptobenzothiazole (0.15 g, 0.810 mmol) in THF (8.10 mL) cooled to 0° C. was added sodium hydride (0.036 g, 0.891 mmol). After stirring 10 min, iodomethane (0.076 mL, 1.215 mmol) was added and the reaction mixture was slowly warmed to room temperature over 2 h. The reaction was diluted with ethyl acetate and quenched with saturated aqueous sodium bicarbonate. The organic layer was washed with brine, dried over anhydrous sodium sulfate, filtered and concentrated in vacuo. 5-fluoro-2-(methylthio)benzo[d]thiazole (0.178 g, 110% yield) was isolated as a white solid. Material was used without any further purification.

Workup

  1. customquenched with saturated aqueous sodium bicarbonate
  2. washThe organic layer was washed with brine
  3. dry with materialdried over anhydrous sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-663da943041f4fe0a6626dabb86a4ea2
Source dataset
uspto-grants-2012_06
Patent number
US08202881B2

Reaction notes

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