Electric Literature of 624-28-2, Adding some certain compound to certain chemical reactions, such as: 624-28-2, name is 2,5-Dibromopyridine,molecular formula is C5H3Br2N, 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 624-28-2.
To a solution of phenol (1.97 g, 20.9 mmol) in N,N-dimethylformamide (100 mL) was added sodium hydride (1.00 g, 20.9 mmol) at 0 C., which was stirred for 5 minutes at 0 C. 2,5-Dibromopyridine (4.50 g, 19.0 mmol) was then added to this reaction solution at 0 C., and stirred for 40 minutes at room temperature. The reaction solution was then stirred for further 3 hours at 120 C. After allowing to room temperature, the reaction solution was partitioned into water and ethyl acetate. The organic layer was separated, washed with water and saturated aqueous sodium chloride, dried over anhydrous magnesium sulfate and filtered. The filtrate was concentrated under a reduced pressure. The residue was purified by silica gel column chromatography (heptane:ethyl acetate=6:1) to obtain the title compound (3.85 g, 81%). 1H-NMR Spectrum (DMSO-d6) delta (ppm): 7.02 (1H, dd, J=0.55, 8.8 Hz), 7.11-7.14 (2H, m), 7.19-7.23 (1H, m), 7.38-7.43 (2H, m), 8.04 (1H, dd, J=2.6, 8.8 Hz), 8.25 (1H, dd, J=0.55, 2.6 Hz).
In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles. 624-28-2, 2,5-Dibromopyridine, other downstream synthetic routes, hurry up and to see.
Reference:
Patent; Eisai R&D Management Co., Ltd.; US2007/105904; (2007); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem