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. 201138-91-2, name is 4,6-Dibromodibenzo[b,d]furan, A new synthetic method of this compound is introduced below., name: 4,6-Dibromodibenzo[b,d]furan
26.9 g Intermediate (22) and 37.8 g 4,6-dibromo dibenzofuran were added into a dry 2 L three-neck flask, followed by adding 800 mL dry and degassed toluene to dissolve. Then, 33.4 g sodium tert-butoxide (3.0 eq.), 0.52 g catalyst palladium diacetate (2% mol) and 2.9 g 1,1?-binaphthyl-2,2?-bis(diphenylphosphino) (BINAP, 4% mol) ligand were added. The reaction mixture was heated up to 110 C. and reacted overnight. After the reaction finished and the reaction mixture was cooled down to room temperature. The residual was absorbed by the added activated carbon, filtered by suction filtration and removed with solvent by rotary evaporation, followed by recrystallization with a mixture of toluene and ethanol, to produce 47.6 g Intermediate (23) at a yield of 90%.
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; NANJING TOPTO MATERIALS CO.,LTD.; KIM, JIN WOO; QIAN, CHAO; GAO, PENGHUI; WANG, XIAOWEI; (157 pag.)US2018/105534; (2018); A1;,
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bromide – Wiktionary