Hydrochloric Acid → Ethyl 3-[1-(p-bromobenzyl)-5-methoxy-2-methylindol-3-yl]-4,4,4-trifluorobutanoat

HRID 1451527Notes

Reaction equation

[CH3:1][O:2][C:3]1[CH:4]=[C:5]2[C:9](=[CH:10][CH:11]=1)[NH:8][C:7]([CH3:12])=[C:6]2[CH:13]([C:20]([F:23])([F:22])[F:21])[CH2:14][C:15]([O:17][CH2:18][CH3:19])=[O:16].C[Si]([N-][Si](C)(C)C)(C)C.[K+].[Br:34][C:35]1[CH:42]=[CH:41][C:38]([CH2:39]Br)=[CH:37][CH:36]=1.Cl>C1COCC1>[Br:34][C:35]1[CH:42]=[CH:41][C:38]([CH2:39][N:8]2[C:9]3[C:5](=[CH:4][C:3]([O:2][CH3:1])=[CH:11][CH:10]=3)[C:6]([CH:13]([C:20]([F:23])([F:22])[F:21])[CH2:14][C:15]([O:17][CH2:18][CH3:19])=[O:16])=[C:7]2[CH3:12])=[CH:37][CH:36]=1

Participants

Conditions

Temperature: 0 °C

Procedure

To a -78° C. solution of the indole from Step 3 (3.1 g, 9.4 mmol) in 65 mL of THF was added KHMDS (0.6M toluene solution, 18.8 mL, 11.3 mmol) dropwise. The solution was warmed to 0° C., then cooled to -78° C. A solution of p-bromobenzyl bromide (3.0 g, 12.2 mmol) was then added, and the solution was allowed to warm to room temperature. The solution was then poured into 1M HCl and extracted with ether. The organic extracts were washed with brine, dried over MgSO4 and evaporated. The residue was purified by flash chromatography (20% ethyl acetate/hexanes) to provide 3.0 g of the title compound.

Workup

temperaturecooled to -78° C
temperatureto warm to room temperature
extractionextracted with ether
washThe organic extracts were washed with brine
dry with materialdried over MgSO4
customevaporated
customThe residue was purified by flash chromatography (20% ethyl acetate/hexanes)

Sources & evidence

ORD record: ord-ea5fb29cbd5944c0a7f547a1785b3b58
Source dataset: uspto-grants-1997_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05604253

Reaction notes

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