Synthetic Route of 51605-32-4, These common heterocyclic compound, 51605-32-4, name is Ethyl 5-methyl-1H-imidazole-4-carboxylate, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.
A. To a stirred suspension of ethyl 4-methyl-1H-imidazole-5-carboxylate (2.00 g, 13.0 mmol) in acetonitrile (25 mL) and chloroform (25 mL) was added N-bromosuccinimide (2.31 g, 13.0 mmol). The reaction mixture was stirred under nitrogen atmosphere for 20 h, then concentrated in vacuo. The residue was dissolved in ethyl acetate (100 mL) and washed with saturated aqueous sodium bicarbonate (50 mL). The organic layer was dried over sodium sulfate, filtered and concentrated in vacuo. The residue was purified by column chromatography eluding with 50percent ethyl acetate in hexanes to afford ethyl 2-bromo-4-methyl-1H-imidazole-5-carboxylate as a light yellow solid (1.88 g, 62percent): 1H NMR (300 MHz, CDCl3) delta 4.35 (q, J=7.1 Hz, 2H), 2.51 (s, 3H), 1.37 (t, J=7.1 Hz, 3H); MS (ES+) m/z 233.1 (M+1), 235.1 (M+1).
The synthetic route of 51605-32-4 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; Dales, Natalie; Fonarev, Julia; Fu, Jianmin; Hou, Duanjie; Kamboj, Rajender; Kodumuru, Vishnumurthy; Pokrovskaia, Natalia; Raina, Vandna; Sun, Shaoyi; Zhang, Zaihui; US2009/156615; (2009); A1;,
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