Hydrochloric Acid → HCID 14567402, compound

HRID 2354277Notes

Reaction equation

HRID 2354277 reaction equation
[CH3:1][C:2]1[CH:10]=[CH:9][CH:8]=[C:7]2[C:3]=1[CH:4]=[CH:5][NH:6]2.[H-].[Na+].[C:13]1([CH3:23])[CH:18]=[CH:17][C:16]([S:19](Cl)(=[O:21])=[O:20])=[CH:15][CH:14]=1.Cl>CN(C)C=O>[CH3:1][C:2]1[CH:10]=[CH:9][CH:8]=[C:7]2[C:3]=1[CH:4]=[CH:5][N:6]2[S:19]([C:16]1[CH:17]=[CH:18][C:13]([CH3:23])=[CH:14][CH:15]=1)(=[O:21])=[O:20]

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 73974-Toluenesulfonyl chlorideHCID 24758Sodium hydrideHCID 852824-Methylindole

Product 1

HCID 14567402HCID 14567402, compoundYield 90.7%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of 4-methyl-1H-indole (2.53 g) in N,N-dimethylformamide (20 mL) was added 55% sodium hydride (0.88 g) under ice-cooling, and the mixture was stirred at the same temperature for 5 minutes. To this mixture was added p-toluenesulfonyl chloride (4.04 g) at the same temperature, and the mixture was stirred at room temperature for 2 hours. The reaction mixture was poured into 1 mol/L hydrochloric acid, and the resulting mixture was extracted with diethyl ether. The extract was washed with water and brine successively, and dried over anhydrous sodium sulfate. The solvent was removed under reduced pressure, and the residue was purified by column chromatography on silica gel (eluent: n-hexane/ethyl acetate=5/1) to give 4-methyl-1-(toluene-4-sulfonyl)-1H-indole (4.99 g). This material was dissolved in dichloromethane (100 mL). To the solution was added bromine (26% dichloromethane solution, 12.62 g) in a dropwise manner under ice-cooling, and the mixture was stirred at the same temperature for 15 minutes. The solvent was removed under reduced pressure, and the residue was purified by column chromatography on silica gel (eluent: n-hexane/ethyl acetate=5/1). The purified material was crystallized from n-hexane-diethyl ether, and the crystals were collected by filtration. The crystals were washed with n-hexane and dried under reduced pressure to give the title compound (4.8 g).

Workup

  1. temperaturecooling
  2. stirringthe mixture was stirred at room temperature for 2 hours
  3. extractionthe resulting mixture was extracted with diethyl ether
  4. washThe extract was washed with water and brine successively
  5. dry with materialdried over anhydrous sodium sulfate
  6. customThe solvent was removed under reduced pressure
  7. customthe residue was purified by column chromatography on silica gel (eluent: n-hexane/ethyl acetate=5/1)

Sources & evidence

ORD record
ord-495a6001f94f42a2960012e0d5b5c9b4
Source dataset
uspto-grants-2010_07
Patent number
US07750145B2

Reaction notes

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