4-methoxy-2-methyl-1-(phenylmethyl)-1H-indole → 1-Benzyl-2-methyl-1H-indol-4-ol

HRID 3338

Reaction equation

HRID 3338 reaction equation
C[O:2][C:3]1[CH:11]=[CH:10][CH:9]=[C:8]2[C:4]=1[CH:5]=[C:6]([CH3:19])[N:7]2[CH2:12][C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1.B(Br)(Br)Br.C(Cl)Cl>C(Cl)Cl>[OH:2][C:3]1[CH:11]=[CH:10][CH:9]=[C:8]2[C:4]=1[CH:5]=[C:6]([CH3:19])[N:7]2[CH2:12][C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1

Participants

4

Reactant 2

HCID 107771474-methoxy-2-methyl-1-(phenylmethyl)-1H-indoleHCID 22277759Boron tribromide dichloromethane

Product 1

HCID 107523601-Benzyl-2-methyl-1H-indol-4-olYield 49%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

A solution of 1.25 g (5 mmol) of 4-methoxy-2-methyl-1-(phenylmethyl)-1H-indole and 20 mL of 1M BBr3 /CH2Cl2 in 50 mL of methylene chloride was stirred at room temperature for 5 hours and concentrated at reduced pressure. The residue was dissolved in ethyl acetate, washed with brine and dried (MgSO4). After concentrating at reduced pressure, the residue was chromatographed on silica gel eluting with 20% EtOAc/hexane to give 577 mg (49% yield) of 4-hydroxy-2-methyl-1-(phenylmethyl)-1H-indole, 125°-127° C.

Workup

  1. concentrationconcentrated at reduced pressure
  2. dissolutionThe residue was dissolved in ethyl acetate
  3. washwashed with brine
  4. dry with materialdried (MgSO4)
  5. concentrationAfter concentrating at reduced pressure
  6. customthe residue was chromatographed on silica gel eluting with 20% EtOAc/hexane

Sources & evidence

ORD record
ord-b929091e25a74504966cd0bf54a67e49
Source dataset
uspto-grants-1998_03
Patent number
US05733923

Linked notes

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