preparation | synthesis of 3-(4,4,5, 5-tetramethyl-1, 3, 2-dioxetylpentaboran-2-yl) bromobenzene: 4.24mmol of M-dibromobenzene, 4.24mmol of cytanoyl biborate, 0.212mmol of 1,1 '-bis (diphenylphosphine) ferrocene Palladium dichloride dichloromethane complex, 600mg of potassium acetate and 20ml of 1, 4-dioxane were added to the two-port reaction bottle, and the vacuum-nitrogen-vacuum was applied to the double-row tube for three cycles, finally, the reaction system was protected with nitrogen, and the reaction was stopped after 10h at 85 °c. The solvent was removed on a rotary evaporator, and a white solid was obtained by column chromatography. Intermediate product 1(3-(4,4,5, 5-tetramethyl-1, 3, 2-dioxane -2-yl) bromobenzene) confirmed by 1H NMR, the results show that the structure is correct, the data are as follows: 1H NMR(400MHz,CDCl3)δ(ppm)= 7.93(s,1H),7.71(d,J = 7.6Hz,1H), 7.58(ddd,J = 8.0,2.0,1.2Hz,1H),7.23(t,J = 7.6Hz,1H),1.34(s,12h). |
Use | teropalatine 3-bromobenzene borate can be used to synthesize a green Iridium (III) complex, with high luminous efficiency, it contains special functional groups, that is, fluorobenzene groups with electron transport properties, which is beneficial to the transmission balance of carriers in the recombination region, thus, the organic light-emitting device has better performance. |