Water → 4-bromo-5-[(phenylmethyl)oxy]-1-(phenylsulfonyl)-2-propyl-1H-indole

HRID 2102049Notes

Reaction equation

HRID 2102049 reaction equation
[C:1]1([CH2:7][O:8][C:9]2[CH:10]=[C:11]3[C:15](=[CH:16][CH:17]=2)[N:14]([S:18]([C:21]2[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=2)(=[O:20])=[O:19])[C:13]([CH2:27][CH2:28][CH3:29])=[CH:12]3)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[Br:30]Br.O>C(O)(=O)C>[Br:30][C:10]1[C:9]([O:8][CH2:7][C:1]2[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=2)=[CH:17][CH:16]=[C:15]2[C:11]=1[CH:12]=[C:13]([CH2:27][CH2:28][CH3:29])[N:14]2[S:18]([C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1)(=[O:20])=[O:19]

Participants

5

Reactant 3

HCID 962WaterHCID 24408BromineHCID 578001035-[(Phenylmethyl)oxy]-1-(phenylsulfonyl)-2-propyl-1H-indole

Product 1

HCID 578002044-bromo-5-[(phenylmethyl)oxy]-1-(phenylsulfonyl)-2-propyl-1H-indole

Reagents, catalysts & solvents 1

HCID 176Acetic AcidSolvent

Procedure

To a rt solution of 5-[(phenylmethyl)oxy]-1-(phenylsulfonyl)-2-propyl-1H-indole (1.16 g, 0.0024) in acetic acid (20 mL, glacial) was added Br2 (1.2 g, 0.008 mol in acetic acid) dropwise. The mixture was stirred for an additional 10 min and water (10 mL) was added. The mixture was extracted with EtOAc (100 mL). The organic layer was separated and dried (MgSO4) and concentrated. Purification via ISCO normal phase chromatography (SiO2, 5-15% ethyl acetate/hexanes) to provide 4-bromo-5-[(phenylmethyl)oxy]-1-(phenylsulfonyl)-2-propyl-1H-indole as the regioselective bromination product: MS (ES) m/z 485 (M+1).

Workup

  1. extractionThe mixture was extracted with EtOAc (100 mL)
  2. customThe organic layer was separated
  3. dry with materialdried (MgSO4)
  4. concentrationconcentrated
  5. customPurification via ISCO normal phase chromatography (SiO2, 5-15% ethyl acetate/hexanes)

Sources & evidence

ORD record
ord-bd940969c2054240b20e9e481083fd3c
Source dataset
uspto-grants-2009_08
Patent number
US07572820B2

Reaction notes

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