Iodoethane → 7-ethoxy-1H-indole

HRID 1993225Notes

Reaction equation

HRID 1993225 reaction equation
[NH:1]1[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][C:8]=2[OH:10])[CH:3]=[CH:2]1.C(=O)([O-])[O-].[K+].[K+].I[CH2:18][CH3:19]>CC(C)=O>[CH2:18]([O:10][C:8]1[CH:7]=[CH:6][CH:5]=[C:4]2[C:9]=1[NH:1][CH:2]=[CH:3]2)[CH3:19]

Participants

5

Reactant 3

HCID 6340IodoethaneHCID 11430Potassium CarbonateHCID 27376517-Hydroxyindole

Product 1

HCID 198489347-ethoxy-1H-indole

Reagents, catalysts & solvents 1

HCID 180AcetoneSolvent

Procedure

To a stirred solution of 1H-indol-7-ol (500 mg, 3.75 mmol) in acetone (10 mL) at r.t. was added potassium carbonate (3.11 g, 22.5 mmol), followed by iodoethane (0.45 mL, 5.63 mol). The mixture was stirred at r.t. for 16h then solvent removed under reduced pressure. The crude product thus obtained was purified by chromatography over silica gel to afford 7-ethoxy-1H-indole: 1H NMR (400 MHz, MeOD) δ ppm 1.51 (t, J=6.95 Hz, 3 H), 4.22 (q, J=6.91 Hz, 2 H), 6.42 (d, J=3.03 Hz, 1H), 6.63 (d, J=7.58 Hz, 1 H), 6.92 (t, J=7.83 Hz, 1 H), 7.04-7.23 (m, 2 H); MS (ES+): m/z 162.20 (MH+).

Workup

  1. customsolvent removed under reduced pressure
  2. customThe crude product thus obtained
  3. customwas purified by chromatography over silica gel

Sources & evidence

ORD record
ord-8af3a204daef4d2896d01cd41262541c
Source dataset
uspto-grants-2010_01
Patent number
US07651687B2

Reaction notes

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