Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 14862-52-3, name is 3,5-Dibromochlorobenzene, A new synthetic method of this compound is introduced below., HPLC of Formula: C6H3Br2Cl
1-chloro-3,5-dibromobenzene (5.40 g, 20 mmol) and 3-pyridine boronic acid (5.17 g, 42 mmol) were added to a 100 mL three neck round bottom flask. To this flask, dioxane (80 mL) and aqueous K2CO3 (2 N, 40 mL) were added. The mixture was stirred and degassed with a steam of argon for 30 minutes. Then under argon atmosphere, 200 mg (0.16 mmol) Pd(PPh3)4 was added. The mixture was brought to 100 C. and stirred overnight. The next day, solvent was removed by roto-evaporation and residue was suspended into an equal amount of water (50 mL) and CH2Cl2 (50 mL). The organic layer was separated from aqueous layer and washed with brine (50 mL×3). After drying over Na2SO4, and removal of drying agent, 5.33 g transparent liquid 3,3′-(5-chloro-1,3-phenylene)dipyridine (100%, Compound L) was obtained. 1H NMR (400 MHz, CDCl3) 8.91 (s, 2H), 8.69 (d, 2H), 7.95 (d, 2H), 7.66 (s, 1H), 7.63 (s, 2H), 7.50-7.44 (m, 2H).
The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.
Reference:
Patent; General Electric Company; US2010/331547; (2010); A1;,
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