N-bromobutanimide → 2-(1-Bromopropyl)pyridine

To a mixture of 2-propylpyridine (2.5 g, 20.63 mmol, purchased from Sigma-Aldrich, St. Louis, Mo.) and (E)-2,2′-(diazene-1,2-diyl)bis(2-methylpropanenitrile) (1.253 g, 7.63 mmol, purchased from Sigma-Aldrich) in CCl4 (60 mL) at rt was added n-bromosuccinimide (1.93 mL, 22.7 mmol, purchased from Sigma-Aldrich). The mixture was stirred under fluorescent light at rt for 12 hr. The precipitate was removed by filtration of the mixture through a pad of Celite® (J.T. Baker, Phillipsberg, N.J., diatomaceous earth), which was washed with CCl4 (10 mL). The filtrate was concentrated under reduced pressure. Purification of the residue by flash chromatography on silica gel (eluent: 20% EtOAc/hexanes) provided the title compound as a yellow liquid. Mass Spectrum (ESI) m/z=199.9 and 201.9 (M+1).

1. customThe precipitate was removed by filtration of the mixture through a pad of Celite® (J.T. Baker, Phillipsberg, N.J., diatomaceous earth), which
2. washwas washed with CCl4 (10 mL)
3. concentrationThe filtrate was concentrated under reduced pressure
4. customPurification of the residue by flash chromatography on silica gel (eluent: 20% EtOAc/hexanes)

ORD record

ord-569de0f71a174f07bb24341fe1067a5b

Source dataset

uspto-grants-2016_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09296736B2