N-bromobutanimide → 5-(3-Bromo-5,5-dimethyl-4-oxo-4,5-dihydrofuran-2-yl)-2-methoxybenzonitrile

HRID 655454Notes

Reaction equation

HRID 655454 reaction equation
[CH3:1][C:2]1([CH3:18])[O:6][C:5]([C:7]2[CH:8]=[CH:9][C:10]([O:15][CH3:16])=[C:11]([CH:14]=2)[C:12]#[N:13])=[CH:4][C:3]1=[O:17].C1C(=O)N([Br:26])C(=O)C1>C(Cl)(Cl)Cl.C(Cl)Cl>[Br:26][C:4]1[C:3](=[O:17])[C:2]([CH3:18])([CH3:1])[O:6][C:5]=1[C:7]1[CH:8]=[CH:9][C:10]([O:15][CH3:16])=[C:11]([CH:14]=1)[C:12]#[N:13]

Participants

5

Reactant 2

HCID 67184N-bromobutanimideHCID 670251415-(5,5-Dimethyl-4-oxo-4,5-dihydrofuran-2-yl)-2-methoxybenzonitrile

Product 1

HCID 593548145-(3-Bromo-5,5-dimethyl-4-oxo-4,5-dihydrofuran-2-yl)-2-methoxybenzonitrileYield 42%

Reagents, catalysts & solvents 2

HCID 6212ChloroformSolventHCID 6344DichloromethaneSolvent

Procedure

To a stirred solution of 5-(5,5-dimethyl-4-oxo-4,5-dihydrofuran-2-yl)-2-methoxybenzonitrile (0.9 g, 3.70 mmol) in CHCl3 (10 mL), NBS (1.1 g, 6.29 mmol) was added portionwise at RT. The reaction mixture was then stirred for 1 h and diluted with DCM (50 mL). the combined organic layers were washed with water (20 mL) and brine (15 mL), dried over Na2SO4, filtered, and then concentrated in vacuo to obtain the crude product. The crude material was purified via silica gel column chromatography to afford 5-(3-bromo-5,5-dimethyl-4-oxo-4,5-dihydrofuran-2-yl)-2-methoxybenzonitrile (0.5 g, 42%) as a yellow solid.

Workup

  1. washthe combined organic layers were washed with water (20 mL) and brine (15 mL)
  2. dry with materialdried over Na2SO4
  3. filtrationfiltered
  4. concentrationconcentrated in vacuo
  5. customto obtain the crude product
  6. customThe crude material was purified via silica gel column chromatography

Sources & evidence

ORD record
ord-4e8d693e50fe4a08a34ed432f28cc62a
Source dataset
uspto-grants-2011_12
Patent number
US08071595B2

Reaction notes

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