Melatonin → n-{2-[5-Methoxy-1-(phenylsulphonyl)-1h-indol-3-yl]ethyl}acetamide

HRID 988228Notes

Reaction equation

HRID 988228 reaction equation
[CH3:1][C:2]([NH:4][CH2:5][CH2:6][C:7]1[C:11]2[CH:12]=[C:13]([O:16][CH3:17])[CH:14]=[CH:15][C:10]=2[NH:9][CH:8]=1)=[O:3].[OH-].[Na+].[C:20]1([S:26](Cl)(=[O:28])=[O:27])[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1>ClCCl.S([O-])(O)(=O)=O.C([N+](CCCC)(CCCC)CCCC)CCC>[CH3:17][O:16][C:13]1[CH:12]=[C:11]2[C:10](=[CH:15][CH:14]=1)[N:9]([S:26]([C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1)(=[O:28])=[O:27])[CH:8]=[C:7]2[CH2:6][CH2:5][NH:4][C:2](=[O:3])[CH3:1]

Participants

6

Reactant 3

HCID 896MelatoninHCID 7369Benzenesulfonyl chlorideHCID 14798Sodium Hydroxide

Product 1

HCID 11090036n-{2-[5-Methoxy-1-(phenylsulphonyl)-1h-indol-3-yl]ethyl}acetamide

Reagents, catalysts & solvents 2

HCID 94433Tetrabutylammonium hydrogen sulfateCatalystHCID 6344DichloromethaneSolvent

Procedure

Dissolve 5 g (21.5 mmol) of melatonin in 150 ml of dichloromethane. With stirring, add 3.41 g (84 mmol) of sodium hydroxide and 0.35 g (0.9 mmol) of tetrabutylammonium hydrogen sulphate. Cool the mixture in an ice-bath, and add 4.06 ml (31.5 mmol) of benzenesulphonyl chloride dropwise. After stirring overnight at room temperature, filter off the excess sodium hydroxide and the catalyst. Remove the solvent by evaporation in vacuo, and recrystallise the resulting solid.

Workup

  1. temperatureCool the mixture in an ice-bath
  2. stirringAfter stirring overnight at room temperature
  3. filtrationfilter off the excess sodium hydroxide
  4. customRemove the solvent
  5. customby evaporation in vacuo
  6. customrecrystallise the resulting solid

Sources & evidence

ORD record
ord-3efdd5efa83f4724bee602a43d9de4c6
Source dataset
uspto-grants-2003_10
Patent number
US06635650B2

Reaction notes

Loading…