A kind of pyridazine iridium complex containing alkyl hindering group and its preparation method and application
A technology of iridium complexes and pyridazines, which is applied in the field of pyridazine iridium complexes and their preparation, can solve the problems of expensive raw materials or raw material adaptability, weak luminescence concentration of iridium complexes, obvious quenching, etc., and achieve reduction Luminescence quenching, phosphorescence quenching is small, and the effect of reducing the intermolecular force
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Embodiment 1
[0044] Add 2.3g (10mmol) 1,4-dichloro-5,6,7,8-tetrahydro-5,8-ethanephthalazine, 2.4g (20mmol) phenylboronic acid and 1.4g (10mmol) potassium carbonate to 250mL In the round bottom flask, add 0.23g (0.2mmol) Pd (PPh 3 ) 4 , then pour 30mL THF and 15mL water, N 2 Protection, reflux at 100°C for 12h. Cool, spin dry tetrahydrofuran, extract with dichloromethane to obtain the lower organic phase, spin dry, and separate by silica gel column chromatography with petroleum ether: ethyl acetate = 1:1 eluent to obtain 0.62 g of 1,4-diphenyl - 5,6,7,8-Tetrahydro-5,8-ethanephthalazine as a white solid in 20% yield. The NMR spectrum of the product is: 1 H NMR (400MHz, CDCl 3 )δ7.71(dd,J=7.5,5.8Hz,5H),7.54-7.48(m,5H),3.44(s,2H),1.88(d,J=8.0Hz,4H),1.46(d,J =7.6Hz, 4H). The mass spectrum of product is: MS ((+)-ESI): m / z=313.33 (calcd.313.17forC 22 h 21 N 2 ,[M+H + ]).
[0045] 0.94g (3mmol) 1,4-diphenyl-5,6,7,8-tetrahydro-5,8-ethanephthalazine, 0.56g (1mmol) IrCl 3 · (tht) 3 , 0...
Embodiment 2
[0048] Add 2.3g (10mmol) 1,4-dichloro-5,6,7,8-tetrahydro-5,8-ethanephthalazine, 4.8g (40mmol) phenylboronic acid and 8.4g (60mmol) potassium carbonate to 500mL In the round bottom flask, add 1.15g (1mmol) Pd (PPh 3 ) 4 , then poured into 60mL tetrahydrofuran and 30mL water, N 2 Protection, reflux at 150°C for 5h. Cool, spin dry THF, extract with dichloromethane to obtain the lower organic phase, spin dry, and separate by silica gel column chromatography with petroleum ether: ethyl acetate = 1:1 eluent to obtain 0.78 g of 1,4-diphenyl - 5,6,7,8-Tetrahydro-5,8-ethanephthalazine as a white solid in 25% yield. The NMR and mass spectra of the product are basically the same
[0049] Example 1.
[0050]1.57g (5mmol) 1,4-diphenyl-5,6,7,8-tetrahydro-5,8-ethanephthalazine, 0.56g (1mmol) IrCl 3 · (tht) 3 , 0.246g (3mmol) anhydrous sodium acetate and 60mL decahydronaphthalene solution, N 2 Protected and reacted at 250°C for 40h. Cool down after the reaction, distill off decahydr...
Embodiment 3
[0052] 2.3g (10mmol) 1,4-dichloro-5,6,7,8-tetrahydro-5,8-ethanephthalazine, 5.4g (20mmol) 4-(trifluoromethyl)phenylboronic acid pina Add alcohol ester and 1.4g (10mmol) potassium carbonate to a 250mL round bottom flask, add 0.2g (0.3mmol) PdCl 2 (dppf), then pour 30mL tetrahydrofuran and 15mL water, N 2 Protection, reflux at 100°C for 12h. Cool, spin dry tetrahydrofuran, extract with dichloromethane to obtain the lower organic phase, spin dry, and use petroleum ether: ethyl acetate = 1:1 eluent silica gel column chromatography to obtain 2.0 g 1,4-bis(p- Trifluoromethylphenyl)-5,6,7,8-tetrahydro-5,8-ethanephthalazine as a white solid, yield 44%. The NMR spectrum of the product is: 1 H NMR (400MHz, CDCl 3 ) δ 7.82 (s, 8H), 3.40 (s, 2H), 1.93 (d, J=8.0Hz, 4H), 1.47 (d, J=7.8Hz, 4H). 19 F NMR (CDCl 3 ,367MHz) δ-62.73(s,6F). The mass spectrum of product is: MS ((+)-ESI): m / z=449.42 (calcd.449.14for C 24 h 19 f 6 N 2 ,[M+H + ]).
[0053] 1.35g (3mmol) 1,4-bis(p-trifluor...
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