Cyanogen Bromide → HCID 21459520, compound

HRID 1940996Notes

Reaction equation

HRID 1940996 reaction equation
CC(C)([O-])C.[K+].[Br:7][C:8]1[NH:9][C:10]([Br:16])=[C:11]([Br:15])[C:12]=1[C:13]#[N:14].[N:17]#[C:18]Br>O1CCCC1.O>[Br:7][C:8]1[N:9]([C:18]#[N:17])[C:10]([Br:16])=[C:11]([Br:15])[C:12]=1[C:13]#[N:14]

Participants

6

Reactant 3

HCID 10476Cyanogen BromideHCID 10471741HCID 10471741, compoundHCID 23665647Potassium tert-butoxide

Product 1

HCID 21459520HCID 21459520, compoundYield 74.4%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 8028TetrahydrofuranSolvent2×

Procedure

Potassium t-butoxide (614 mg, 5.74 mmol) is added in portions at room temperature to a solution of 2,4,5-tribromopyrrole-3-carbonitrile (1.50 g, 4.56 mmol) in anhydrous tetrahydrofuran (20 mL). After 15 minutes a solution of cyanogen bromide (177 mg, 5.74 mmol) in tetrahydrofuran (5 mL) is added dropwise. The reaction solution is stirred at room temperature overnight as it turns cloudy. The mixture is diluted with water and extracted with ethyl acetate. The organic layer is washed with water and saturated sodium chloride and dried over (Na2SO4). Evaporation of the solvent and crystallization of the residue from ether gives a white solid (1.20 g); mp 195.0°-197.5° C.

Workup

  1. extractionextracted with ethyl acetate
  2. washThe organic layer is washed with water and saturated sodium chloride
  3. dry with materialdried over (Na2SO4)
  4. customEvaporation of the solvent and crystallization of the residue from ether

Sources & evidence

ORD record
ord-85460278c01e4bfe872b52c585e6a8d4
Source dataset
uspto-grants-1997_12
Patent number
US05702681

Reaction notes

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