Triethylamine → 3-Bromo-2-fluorobenzamide

HRID 2263503Notes

Reaction equation

HRID 2263503 reaction equation
[Br:1][C:2]1[C:3]([F:11])=[C:4]([CH:8]=[CH:9][CH:10]=1)[C:5](O)=[O:6].C([N:14](CC)CC)C.S(Cl)(Cl)=O>O1CCCC1>[Br:1][C:2]1[C:3]([F:11])=[C:4]([CH:8]=[CH:9][CH:10]=1)[C:5]([NH2:14])=[O:6]

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 24386Thionyl ChlorideHCID 27363133-Bromo-2-fluorobenzoic acid

Product 1

HCID 442031023-Bromo-2-fluorobenzamideYield 46.9%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 3-bromo-2-fluorobenzoic acid (3.77 g, 17.2 mmol) in dry tetrahydrofuran (200 ml) was added triethylamine (4.77 ml, 34.4 mmol) and thionyl chloride (1.69 ml, 21.5 mmol). The reaction mixture was stirred for 1 h and then quenched with ammonia in methanol (10 ml, saturated). After an additional hour of stirring the mixture was evaporated and the crude product was purified by flash column chromatography (ethyl acetate/isooctane 1:1) to give the title compound (1.76 g). MS m/z (rel. intensity, 70 eV) 219 (M+, 26), 217 (M+, 26), 203 (62), 201 (70), 94 (bp).

Workup

  1. customquenched with ammonia in methanol (10 ml, saturated)
  2. stirringAfter an additional hour of stirring the mixture
  3. customwas evaporated
  4. customthe crude product was purified by flash column chromatography (ethyl acetate/isooctane 1:1)

Sources & evidence

ORD record
ord-8803a072cd70481e86d2423229039299
Source dataset
uspto-grants-2010_12
Patent number
US07851629B2

Reaction notes

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