With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.24673-56-1,3-Methylbenzofuran-2-carboxylic acid,as a common compound, the synthetic route is as follows.
To a solution of 3- methylbenzo[b]furan-2-carboxylic acid ( 1 eq, 52 mmol), methylamine hydrochloride (1.1 eq, 57.52 mmol), /V,/V-diisopropylethylamine (2.2 eq, 114.4 mmol), and HOBt (1.1 eq, 57.52 mmol) in DMF (150 mL) was added EDC (1.1 eq, 57.52 mmol). The reaction mixture was heated to 70 C overnight. The solvent was reduced to a few mL. The crude reaction mixture was diluted with CH2Cl2 and washed with saturated aqueous sodium bicarbonate. The organic extracts were dried over sodium sulfate and concentrated under reduced pressure. Purification by flash column chromatography (4 Precursor a, 20:50:30, EtOAc:CH2Cl2:hexanes) yielded N, 3- dimethylbenzofuran-2-carboxamide (9.24 g, 48.9 mmol, 94%) as a white solid. 1H NMR (500 MHz, Chloroform-d): 57.61 (dt, J = 7.8, 1.0 Hz, 1H), 7.45 – 7.36 (m, 2H), 7.29 (ddd, J = 8.0, 6.4, 1.7 Hz, 1H), 6.64 (s, 1H), 3.03 (d, / = 5.0 Hz, 3H), 2.63 (s, 3H). 13C NMR (126 MHz, Chloroform-d): 5 161.10, 153.35, 142.96, 129.95, 127.04, 123.19, 122.19, 121.07, 111.55, 25.86, 9.00.
24673-56-1, The synthetic route of 24673-56-1 has been constantly updated, and we look forward to future research findings.
Reference£º
Patent; THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ILLINOIS; HERGENROTHER, Paul J.; GEDDES, Emily Jane; DROWN, Bryon Shane; MOTIKA, Stephen E.; PARKER, Erika Nicole; (141 pag.)WO2019/177975; (2019); A1;,
Benzofuran – Wikipedia
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