Sodium Azide → 6-(2-Azido-ethoxy)-2-methyl-3-(4-trifluoromethyl-phenyl)-benzo[b]thiophene

HRID 347249Notes

Reaction equation

[CH3:1][C:2]1[S:6][C:5]2[CH:7]=[C:8]([O:11][CH2:12][CH2:13]OS(C)(=O)=O)[CH:9]=[CH:10][C:4]=2[C:3]=1[C:19]1[CH:24]=[CH:23][C:22]([C:25]([F:28])([F:27])[F:26])=[CH:21][CH:20]=1.[N-:29]=[N+:30]=[N-:31].[Na+]>CN(C)C=O>[N:29]([CH2:13][CH2:12][O:11][C:8]1[CH:9]=[CH:10][C:4]2[C:3]([C:19]3[CH:24]=[CH:23][C:22]([C:25]([F:28])([F:27])[F:26])=[CH:21][CH:20]=3)=[C:2]([CH3:1])[S:6][C:5]=2[CH:7]=1)=[N+:30]=[N-:31]

Participants

Conditions

Temperature: 80 °C

Procedure

0.300 g (0.697 mmol) Methanesulfonic acid 2-[2-methyl-3-(4-trifluoromethyl-phenyl)-benzo[b]thiophen-6-yloxy]-ethyl ester dissolved in 2.0 ml of N,N-dimethylformamide were treated with 0.137 g (2.09 mmol) sodium azide and the reaction mixture heated to 80° C. for 1 hour. It was then cooled to room temperature, poured into 30 ml of ice-water and extracted 3 times with 10 ml of ether. The combined ether phases were washed with brine, dried over magnesium sulfate and evaporated under reduced pressure giving 0.262 g (99.6%) 6-(2-Azido-ethoxy)-2-methyl-3-(4-trifluoromethyl-phenyl)-benzo[b]thiophene as colorless oil, MS: 377 (M+).

Workup

temperatureIt was then cooled to room temperature
extractionextracted 3 times with 10 ml of ether
washThe combined ether phases were washed with brine
dry with materialdried over magnesium sulfate
customevaporated under reduced pressure

Sources & evidence

ORD record: ord-3597f39c78d0427a89f09f0c468776ae
Source dataset: uspto-grants-2007_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07173043B2

Reaction notes

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