Bromine → 5-Bromo-3,3-diethyl-1,3-dihydro-2H-indol-2-one

HRID 396230

Reaction equation

HRID 396230 reaction equation
[CH2:1]([C:3]1([CH2:13][CH3:14])[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[NH:5][C:4]1=[O:12])[CH3:2].C([O-])(=O)C.[Na+].[Br:20]Br>C(O)(=O)C.O>[Br:20][C:9]1[CH:10]=[C:11]2[C:6](=[CH:7][CH:8]=1)[NH:5][C:4](=[O:12])[C:3]2([CH2:1][CH3:2])[CH2:13][CH3:14]

Participants

6

Reactant 3

HCID 24408BromineHCID 517045Sodium AcetateHCID 151532213,3-diethyl-2,3-dihydro-1H-indol-2-one

Product 1

HCID 219862505-Bromo-3,3-diethyl-1,3-dihydro-2H-indol-2-one

Reagents, catalysts & solvents 2

HCID 176Acetic AcidSolventHCID 962WaterSolvent

Procedure

A solution of 3,3-diethylindol-2-one (8 g, 40 mmol) and sodium acetate (4 g, 48 mmol) in acetic acid (100 ml) was treated with bromine (6.4 g, 40 mmol). After 30 min. the mixture was diluted with water and extracted with EtOAc (2×); the combined organic layers were washed with water, sat. sodium hydrogen carbonate solution, then brine, dried (MgSO4) and evaporated to afford the crude product (7.6 g, 75%). A sample was recrystallized from EtOAc/hexane to obtain the subtitled compound, m.p. 164-165° C.; 1H-NMR (DMSO-d6) δ 10.45 (s, 1H), 7.41-7.40(d, 1H, J=2.2 Hz), 7.34-7.31 (m, 1H), 6.78-6.76 (d, 1H J=8.2 Hz), 1.78-1.65 (m, 4H), 0.50-0.46 (m, 6H); MS (−ESI) m/z 266/268 (M−H).

Workup

  1. extractionextracted with EtOAc (2×)
  2. washthe combined organic layers were washed with water, sat. sodium hydrogen carbonate solution
  3. dry with materialbrine, dried (MgSO4)
  4. customevaporated
  5. customto afford the crude product (7.6 g, 75%)
  6. customA sample was recrystallized from EtOAc/hexane

Sources & evidence

ORD record
ord-6e43cad6c49244109f9ac430f75dc4c3
Source dataset
uspto-grants-2003_08
Patent number
US06608068B2

Linked notes

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