With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.360575-29-7,Methyl 4-bromobenzo[b]thiophene-2-carboxylate,as a common compound, the synthetic route is as follows.
12202] A mixture of 353 mg of methyl 4-bromobenzo[b] thiophene-2-carboxylate, 217 mg of 2-thiophene boronic acid, 287 mg of lithium chloride, 248 mg of sodium carbonate, 75 mg of tetrakis(triphenylphosphine)palladium (0), 10 ml of 1 ,4-dioxane, and 5 ml of water was stirred for 3 hours at 100 C. under a nitrogen atmosphere. After being cooled to room temperature, the reaction mixture was concentrated under reduced pressure. Chloroform and water were added to the residues, and insoluble matter was separated by filtration. The aqueous layer was extracted twice by using chloroform, and the collected organic layer was washed with saturated saline, dried over magnesium sulfate, and then concentrated under reduced pressure. The residues were subjected to silica gel colunm chromatography, thereby obtaining 350 mg of methyl 4-(2-thienyl)benzo[b]thiophene-2-carboxylate (hereinafier, described as a ?compound 52 of the present invention?).12203] Compound 52 of the Present Invention 12204] ?H-NMR (CDC13) oe: 8.42 (s, 1H), 7.84-7.82 (m,1H), 7.51-7.48 (m, 2H), 7.44-7.42 (m, 1H), 7.36-7.35 (m,1H), 7.20-7.18 (m, -1H), 3.95 (s, 3H)., 360575-29-7
The synthetic route of 360575-29-7 has been constantly updated, and we look forward to future research findings.
Reference£º
Patent; SUMITOMO CHEMICAL COMPANY, LIMITED; Mukumoto, Fujio; Tamaki, Hiroaki; Kusaka, Shintaro; Iwakoshi, Mitsuhiko; US2015/282482; (2015); A1;,
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