2-Bromopyridine → 2-(Tributylstannyl)pyridine

To a solution of 2-bromopyridine (5 g, 31.65 mmol, 1.00 equiv) in freshly distilled THF (50 mL) was added n-BuLi (15.3 mL, 3.80 mmol, 1.20 equiv) dropwise at −78° C. under N2. After stirring for 30 min at this temperature, tributyl(chloro)stannane (12.5 g, 38.40 mmol, 1.21 equiv) was added via a syringe at −78° C. and stirred for additional 1 h. Then the reaction mixture was warmed to room temperature and stirred for another 2 h. The reaction was quenched by the addition of 50 mL of NH4Cl (sat), extracted with 3×100 mL of ethyl acetate, washed with brine, dried over anhydrous sodium sulfate and concentrated under vacuum. The residue was purified on a silica gel column with ethyl acetate/petroleum ether (1/20) to give 2-(tributylstannyl)pyridine (1.0 g) as a pale yellow oil.

1. additionwas added via a syringe at −78° C.
2. stirringstirred for another 2 h
3. customThe reaction was quenched by the addition of 50 mL of NH4Cl (sat)
4. extractionextracted with 3×100 mL of ethyl acetate
5. washwashed with brine
6. dry with materialdried over anhydrous sodium sulfate
7. concentrationconcentrated under vacuum
8. customThe residue was purified on a silica gel column with ethyl acetate/petroleum ether (1/20)

ORD record

ord-e0271149881348589108557aeb3b49f1

Source dataset

uspto-grants-2016_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09340554B2