Water → 3-Methyl-2-(tributylstannyl)pyridine

HRID 2197219Notes

Reaction equation

HRID 2197219 reaction equation
Br[C:2]1[C:7]([CH3:8])=[CH:6][CH:5]=[CH:4][N:3]=1.C([Li])CCC.[CH2:14]([Sn:18](Cl)([CH2:23][CH2:24][CH2:25][CH3:26])[CH2:19][CH2:20][CH2:21][CH3:22])[CH2:15][CH2:16][CH3:17].O>O1CCCC1.CCCCCC>[CH3:8][C:7]1[C:2]([Sn:18]([CH2:19][CH2:20][CH2:21][CH3:22])([CH2:23][CH2:24][CH2:25][CH3:26])[CH2:14][CH2:15][CH2:16][CH3:17])=[N:3][CH:4]=[CH:5][CH:6]=1

Participants

7

Reactant 4

HCID 962WaterHCID 15096Tributyltin ChlorideHCID 2208322-Bromo-3-methylpyridineHCID 178418339Butyllithium

Product 1

HCID 164270983-Methyl-2-(tributylstannyl)pyridineYield 79%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 8058HexaneSolvent

Procedure

A solution (10 mL) of 2-bromo-3-methylpyridine (1.0 g) in tetrahydrofuran was cooled to −70° C., and a 1.6 mol/L solution (4.0 mL) of n-butyllithium in hexane was added dropwise. After stirring at the same temperature for 15 min, tributyltin chloride (2.2 g) was added dropwise. After further stirring for 1 hr, water was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The extract was washed with saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (eluent: hexane-ethyl acetate=19:1) to give the title compound as a colorless oil (yield 1.75 g, 79%).

Workup

  1. stirringAfter further stirring for 1 hr
  2. extractionthe mixture was extracted with ethyl acetate
  3. washThe extract was washed with saturated brine
  4. dry with materialdried over anhydrous sodium sulfate
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was purified by silica gel column chromatography (eluent: hexane-ethyl acetate=19:1)

Sources & evidence

ORD record
ord-0ebe68d0a1c54e6ebdce5427a4f79aa5
Source dataset
uspto-grants-2012_12
Patent number
US08338462B2

Reaction notes

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