61921-39-9, A common compound: 61921-39-9, name is 4-Bromotetraphene, belongs to bromides-buliding-blocks compound, it can change the direction of chemical reaction, and react with certain compounds to generate new functional products. A new synthetic method of this compound is introduced below.
Example 54 Synthesis of 4-(diphenylamino)benz[a]anthracene 190 mul (1 mmol) of chlorodi-tert-butylphosphine and then 112 mg (0.5 mmol) of palladium(II) acetate are added to a suspension of 15.4 g (50 mmol) of 4-bromobenz[a]anthracene, 10.2 g (60 mmol) of diphenylamine and 7.7 g (80 mmol) of sodium tert-butoxide in 500 ml of toluene, and the mixture is subsequently heated under reflux for 5 h. After the mixture has been cooled to 60 C., 500 ml of water are added, the organic phase is separated off, filtered through silica gel, evaporated virtually to dryness at 80 C. in vacuo, and 300 ml of ethanol are then added. After cooling, the solid is filtered off with suction. Recrystallisation five times from dioxane (about 8 ml/g); sublimation (p=5*10-5 mbar, T=280 C.). Yield: 12.7 g (32 mmol), 64.1%, purity 99.9% (HPLC), Tg=74.7 C.
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, 4-Bromotetraphene, other downstream synthetic routes, hurry up and to see.
Reference:
Patent; Stoessel, Philipp; Buesing, Arne; Heil, Holger; US2010/187505; (2010); A1;,
Bromide – Wikipedia,
bromide – Wiktionary