Adding a certain compound to certain chemical reactions, such as: 2849-93-6, name is 1H-Benzimidazole-2-carboxylic acid, belongs to imidazoles-derivatives compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 2849-93-6, name: 1H-Benzimidazole-2-carboxylic acid
To a cold (O0C) solution of lH-benzoimidazole-2-carboxylic acid (42.0 mg; 0.23 mmol) in dry DCM (2 mL) were added oxalyl chloride (90.0 uL; 0.92 mmol) and few drops of DMF. The mixture was allowed to warm to room temperature and the stirring was maintained for 3 hours. The solvent was evaporated under vacuum and the resulting compound was dissolved in DCM (2 mL). This solution was added dropwise to a stirred mixture of N-[4-(2-amino-l,l-dimethyl-ethyl)-phenyl]-3,4-dimethoxy- benzamide (70.0 mg; 0.21 mmol), prepared as described in 26(A) and triethylamine (79 uL; 0.51 mmol) in DCM (2 mL) at O0C. After stirring at room temperature for 16 hours, the precipitate was collected by filtration, re-dissolved in DCM and washed with sat. NaHCO3. The organic phase was dried over Na2SO4, filtered and evaporated to dryness to afford the title compound as a white solid (35.0 mg; 32% yield). 1H NMR (300 MHz, DMSO-d6) delta(ppm): 13.23 (br. s., 1 H), 10.02 (s, 1 H), 8.20 (t, 1 H), 7.72 (m, 2 H), 7.66-7.77 (m, 1 H), 7.62 (dd, 1 H), 7.48-7.59 (m, 1 H), 7.54 (d, 1 H), 7.43 (d, 2 H), 7.18-7.37 (m, 2 H), 7.08 (d, 1 H), 3.85 (s, 3 H), 3.84 (s, 3 H), 3.57 (d, 2 H), 1.34 (s, 6 H)LCMS (RT): 2.10 min (Method G); MS (ES+) gave m/z: 473.27 (MH+). MP: 223-226 0C.
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Reference:
Patent; ADDEX PHARMA SA; WO2008/117175; (2008); A2;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem