360575-29-7, Methyl 4-bromobenzo[b]thiophene-2-carboxylate is a benzothiophene compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated
A mixture of 300 mg of methyl 4-bromobenzo[b]thiophene-2-carboxylate, 100 mg of lithium hydroxide monohydrate,3 ml of water, and 9 ml of methanol was stirred for 2 hours at 75C. The reaction mixture was concentratedunder reduced pressure, water was added to the residues, and the residue was washed three times with tert-butyl methylether. Concentrated hydrochloric acid was added to the aqueous layer, and then extraction was performed three timesby using tert-butyl methyl ether. The collected organic layer was washed with saturated saline, dried over magnesiumsulfate, and then concentrated under reduced pressure, thereby obtaining 270 mg of 4-bromobenzo[b]thiophene-2-carboxylic acid (hereinafter, described as a “compound 10 of the present invention”). Compound 10 of the presentinvention 1H-NMR (DMSO-D6) delta: 13.79 (br s, 1H), 8.11 (dd, 1H, J = 7.8, 0.8 Hz), 7.97 (s, 1H), 7.73 (dd, 1H, J = 7.8, 0.8 Hz), 7.46(t, 1H, J = 7.8 Hz).
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Reference£º
Patent; Sumitomo Chemical Company Limited; MUKUMOTO, Fujio; TAMAKI, Hiroaki; KUSAKA, Shintaro; IWAKOSHI, Mitsuhiko; EP2926660; (2015); A1;,
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