In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 50548-45-3, name is 1-Bromodibenzo[b,d]furan belongs to bromides-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below. category: bromides-buliding-blocks
General procedure: 0.6 mmol of tri-o-tolylphosphine and then 0.1 mmol of palladium(II) acetate or 0.3 mmol of tetrakis(triphenylphosphino)palladium(0) are added to a suspension of 10 mmol of a borylated complex, 12-20 mmol of aryl bromide per (RO)2B function and 60-100 mmol of the base (potassium fluoride, tripotassium phosphate (anhydrous, monohydrate or trihydrate), potassium carbonate, caesium carbonate, etc.) and 100 g of glass beads (diameter 3 mm) in 100 ml-500 ml of an aprotic solvent (THF, dioxane, xylene, mesitylene, dimethylacetamide, NMP, DMSO, etc.), and the mixture is heated under reflux for 1-24 h. Alternatively, other phosphines, such as triphenylphosphine, tri-tert-butylphosphine, S-Phos, X-Phos, Ru-Phos, XanthPhos, etc. can be employed, where, in the case of these phosphines, the preferred phosphine:palladium ratio is 3:1 to 1.2:1. The solvent is removed in vacuo, the product is taken up in a suitable solvent (toluene, dichloromethane, ethyl acetate, etc.) and purified as described under Variant A.
The synthetic route of 50548-45-3 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; Merck Patent GmbH; STOESSEL, Philipp; EHRENREICH, Christian; (218 pag.)US2019/315787; (2019); A1;,
Bromide – Wikipedia,
bromide – Wiktionary