Potassium Hydroxide → 3-methyl-2-[2-[[1-(5-methyl-1-trityl-1H-imidazol-4-yl)ethyl]amino]ethyl]indole

HRID 1657324Notes

Reaction equation

[CH3:1][C:2]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[N:4](S(C2C=CC=CC=2)(=O)=O)[C:3]=1[CH2:20][CH2:21][NH:22][CH:23]([C:25]1[N:26]=[CH:27][N:28]([C:31]([C:44]2[CH:49]=[CH:48][CH:47]=[CH:46][CH:45]=2)([C:38]2[CH:43]=[CH:42][CH:41]=[CH:40][CH:39]=2)[C:32]2[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=2)[C:29]=1[CH3:30])[CH3:24].[OH-].[K+]>CS(C)=O.O>[CH3:1][C:2]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[NH:4][C:3]=1[CH2:20][CH2:21][NH:22][CH:23]([C:25]1[N:26]=[CH:27][N:28]([C:31]([C:32]2[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=2)([C:44]2[CH:45]=[CH:46][CH:47]=[CH:48][CH:49]=2)[C:38]2[CH:39]=[CH:40][CH:41]=[CH:42][CH:43]=2)[C:29]=1[CH3:30])[CH3:24]

Participants

Conditions

Temperature: 70 °C

Procedure

A mixture of (-)-3-methyl-2-[2-[[1-(5-methyl-1-trityl-1H-imidazol-4-yl)ethyl]amino]ethyl]-1-(benzenesulfonyl)indole (4.6 g) and powdered potassium hydroxide (3.9 g) in dimethyl sulfoxide (46 ml) were stirred at 70° C. for 1 hour. The resultant mixture was diluted with cold water and extracted twice with a mixture of ethyl acetate-tetrahydrofuran (1:1, V/V). The extracts were washed with brine, dried over anhydrous magnesium sulfate and evaporated in vacuo. The residue was chromatographed on silica gel (eluted with 5% methanol in chloroform) to give (-)-3-methyl-2-[2-[[1-(5-methyl-1-trityl-1H-imidazol-4-yl)ethyl]amino]ethyl]indole (2.9 g) as amorphous powder.

Workup

extractionextracted twice with a mixture of ethyl acetate-tetrahydrofuran (1:1, V/V)
washThe extracts were washed with brine
dry with materialdried over anhydrous magnesium sulfate
customevaporated in vacuo
customThe residue was chromatographed on silica gel (eluted with 5% methanol in chloroform)

Sources & evidence

ORD record: ord-8fe093c467a84ddf89b6606993589488
Source dataset: uspto-grants-1993_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05256780

Reaction notes

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