The synthetic route of 614-97-1 has been constantly updated, and we look forward to future research findings.
Electric Literature of 614-97-1,Some common heterocyclic compound, 614-97-1, name is 5-Methyl-1H-benzo[d]imidazole, molecular formula is C8H8N2, 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.
To a solution of 5-methyl-1H-benzo[d]imidazole (2.0 g, 15.13 mmol), triethylamine (5.27 mL, 37.8 mmol) in dichloromethane (30 mL) was added di-tert-butyl dicarbonate (5.27 mL, 22.70 mmol). The reaction mixture was stirred overnight at room temperature, and the resulting solution was diluted with water (30 mL), extracted with ethyl acetate (3 x 20 mL). The organic layers were combined, washed with aqueous sodium carbonate and brine, dried, filtered, and concentrated under vacuum to afford a mixture of tert-butyl 5-methyl- 1H-benzo[d]imidazole-1-carboxylate and tert-butyl 6-methyl-1H-benzo[d]imidazole-1- carboxylate (3.12 g) as a yellow oil. LCMS m/z = 177.1 [M+H-isobutylene]+. To a solution of a mixture of tert-Butyl 5-methyl-1H-benzo[d]imidazole-1-carboxylate and tert-butyl 6- methyl-1H-benzo[d]imidazole-1-carboxylate(1.0 g, 4.31 mmol) and NBS (0.766 g, 4.31 mmol) in CCl4 (30 mL) stirred under nitrogen at room temperature was added AIBN (0.071 g, 0.431 mmol). The reaction mixture was refluxed overnight. The reaction mixture was cooled to room temperature, washed with water (3 x 50 mL), and concentrated to afford a mixture of tert-butyl 5-(bromomethyl)-1H-benzo[d]imidazole-1-carboxylate and tert-butyl 6- (bromomethyl)-1H-benzo[d]imidazole-1-carboxylate (0.7 g) as a yellow oil. LCMS m/z = 211.0 [M+H-boc]+. To a solution of 4-ethyl-2-mercapto-6-(4-methyl-1,4-diazepan-1-yl)pyridine-3,5- dicarbonitrile (synthesis described in example 69 step 1, 581 mg, 1.93 mmol) and triethylamine (488 mg, 4.82 mmol) in DMF (20 mL) was added a mixture of tert-butyl 5- (bromomethyl)-1H-benzo[d]imidazole-1-carboxylate and tert-butyl 6-(bromomethyl)-1H- benzo[d]imidazole-1-carboxylate (600 mg, 1.93 mmol). The reaction mixture was stirred at room temperature for 2 hours. The mixture was poured into 20 mL of water. The resulting solution was extracted with ethyl acetate (3 x 20 mL). The organic layers were combined, washed with brine and water, then dried and concentrated. The residue was purified by silica gel column (0-50% ethyl acetate in hexane) to afford a mixture of tert-butyl 5-(((3,5- dicyano-4-ethyl-6-(4-methyl-1,4-diazepan-1-yl)pyridin-2-yl)thio)methyl)-1H- benzo[d]imidazole-1-carboxylate and tert-butyl 6-(((3,5-dicyano-4-ethyl-6-(4-methyl-1,4- diazepan-1-yl)pyridin-2-yl)thio)methyl)-1H-benzo[d]imidazole-1-carboxylate (410 mg, 0.77 mmol) as a yellow solid. LCMS m/z = 532.1 [M+H]+. To a mixture of tert-butyl 5-(((3,5- , pan-1-yl)pyridin-2- yl)thio)methyl)-1H-benzo[d]imidazole-1-carboxylate and tert-butyl 6-(((3,5-dicyano-4-ethyl- 6-(4-methyl-1,4-diazepan-1-yl)pyridin-2-yl)thio)methyl)-1H-benzo[d]imidazole-1- carboxylate (430 mg, 0.81 mmol) in DCM (5.0 mL) was added trifluoroacetic acid (5.0 mL), then the reaction mixture was stirred overnight at room temperature. The residue was diluted with water, then adjusted to pH 13 with Na2CO3. The resulting solution was extracted with ethyl acetate (3 x 15 mL). The organic layers were combined, washed with aqueous sodium carbonate and brine, dried and concentrated under vacuum. The residue was purified by silica gel column (50% ethyl acetate n hexane) to afford 2-(((1H- benzo[d]imidazol-5-yl)methyl)thio)-4-ethyl-6-(4-methyl-1,4-diazepan-1-yl)pyridine-3,5- dicarbonitrile (310 mg, 0.71 mmol) as a yellow oil. LCMS m/z = 432.1 [M+H]+.1H NMR (400 MHz, MeOD) delta ppm 8.18 (s, 1H), 7.67 (s, 1H), 7.59 (d, J = 8.3 Hz, 1H), 7.34 (d, J = 8.3 Hz, 1H), 4.65 (s, 2H), 3.97 (d, J = 4.8 Hz, 4H), 2.95- 2.86 (m, 2H), 2.71- 2.63 (m, 2H), 2.62- 2.56 (m, 2H), 2.28 (s, 3H), 2.09-1.99 (m, 2H), 1.32 (t, J = 6.1 Hz, 3H).
The synthetic route of 614-97-1 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; GLAXOSMITHKLINE INTELLECTUAL PROPERTY DEVELOPMENT LIMITED; ADAMS, Nicholas David; BENOWITZ, Andrew B.; RUEDA BENEDE, Maria Lourdes; EVANS, Karen Anderson; FOSBENNER, David T.; KING, Bryan Wayne; LI, Mei; MILLER, William Henry; REIF, Alexander Joseph; ROMERIL, Stuart Paul; SCHMIDT, Stanley J.; WIGGALL, Kenneth; (1283 pag.)WO2017/216726; (2017); A1;,
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