Dimethylformamide → Methyl 7-(trifluoromethyl)-1-benzothiophene-2-carboxylate

HRID 2271306Notes

Reaction equation

F[C:2]1[C:9]([C:10]([F:13])([F:12])[F:11])=[CH:8][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:9]1[C:2]2[S:16][C:15]([C:14]([O:18][CH3:19])=[O:17])=[CH:4][C:3]=2[CH:6]=[CH:7][CH:8]=1

Participants

Conditions

Temperature: 60 °C

Procedure

A mixture of 1.10 g of 2-fluoro-3-(trifluoromethyl)benzaldehyde, 663 mg of methyl thioglycolate, 1.03 g of potassium carbonate and 15 ml of DMF was stirred at 60° C. for 2 hours. 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 1.34 g of methyl 7-(trifluoromethyl)benzo[b]thiophene-2-carboxylate (the present compound 4).

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
concentrationand then concentrated under reduced pressure

Sources & evidence

ORD record: ord-02fd34350e7942eba74e894e4aac31d7
Source dataset: uspto-grants-2015_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09119396B2

Reaction notes

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