Dimethylformamide → Methyl 6-(trifluoromethyl)-1-benzothiophene-2-carboxylate

HRID 589281Notes

Reaction equation

F[C:2]1[CH:9]=[C:8]([C:10]([F:13])([F:12])[F:11])[CH:7]=[CH:6][C:3]=1[CH:4]=O.[C:14]([O:18][CH3:19])(=[O:17])[CH2:15][SH:16].C(=O)([O-])[O-].[K+].[K+].CN(C=O)C>O>[F:11][C:10]([F:13])([F:12])[C:8]1[CH:7]=[CH:6][C:3]2[CH:4]=[C:15]([C:14]([O:18][CH3:19])=[O:17])[S:16][C:2]=2[CH:9]=1

Participants

Conditions

Temperature: 140 °C

Procedure

A mixture of 1.11 g of 2-fluoro-4-(trifluoromethyl)benzaldehyde, 739 mg of methyl thioglycolate, 1.3 g of potassium carbonate and 20 ml of DMF was stirred at 140° C. for hours, and then the reaction mixture was cooled to room temperature. To the reaction mixture was added water, and then extracted with tert-butyl methyl ether 3 times. The combined organic layer was washed with water, followed by saturated aqueous sodium chloride solution. The mixture was dried over magnesium sulfate, and then concentrated under reduced pressure to obtain 848 mg of methyl 6-(trifluoromethyl)benzo[b]thiophene-2-carboxylate.

Workup

temperaturethe reaction mixture was cooled to room temperature
extractionextracted with tert-butyl methyl ether 3 times
washThe combined organic layer was washed with water
dry with materialThe mixture was dried over magnesium sulfate
concentrationconcentrated under reduced pressure

Sources & evidence

ORD record: ord-0247623088074d76875e4ab95f35e7c3
Source dataset: uspto-grants-2016_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09232792B2

Reaction notes

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