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Chemical Structure| 19802-70-1 Chemical Structure| 19802-70-1

Structure of 19802-70-1

Chemical Structure| 19802-70-1

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Product Details of [ 19802-70-1 ]

CAS No. :19802-70-1
Formula : C20H12Br2N2
M.W : 440.13
SMILES Code : BrC1=CC=C(C2=NC3=CC=CC=C3N=C2C4=CC=C(Br)C=C4)C=C1

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Application In Synthesis of [ 19802-70-1 ]

* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

  • Downstream synthetic route of [ 19802-70-1 ]

[ 19802-70-1 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 19802-70-1 ]
  • [ 56525-79-2 ]
  • 2,3-bis[4-(3,6-diphenylcarbazol-9-yl)pbenyl]quinoxaline [ No CAS ]
YieldReaction ConditionsOperation in experiment
57% With potassium carbonate;palladium diacetate; tri-tert-butyl phosphine; In hexane; xylene; at 130℃; for 12h; [Step 3] A synthesis method of 2,3-bis[4-(3,6-diphenylcarbazol-9-yl)pbenyl]quinoxaline (DPCPQ) is described. A synthesis scheme of DPCPQ was represented by (a-3). [Show Image] 2.3g of 2,3-bis(4-bromophenyl)quinoxaline (6.1 mmol), 4.3 g of 3,6-diphenyl carbazole (14 mmol), 0.061g of palladium(II) acetate (0.27 mmol), 5.6 g of potassium carbonate (41 mmol) were put into a 200 mL three-necked flask, and the inside was substituted by nitrogen. Into this mixture, 50 mL of xylene, and 1.7 g of tri(tert-butyl)phosphine (10 percent hexane solution) (0.81 mmol) were added. This mixture was stirred for 12 hours at 130 °C. After the reaction, a precipitate of the reaction mixture was filtrated by suction to be collected. The obtained solid was dissolved in chloroform and this solution was filtrated by suction through Florisil, celite, and alumina. The filtrate was condensed, the obtained solid was recombined with a mixed solvent of chloroform and hexane to be recrystallized and 3.2 g of an objective matter, a lemon-yellow powder solid was obtained at the yield 57 percent. It was confirmed by a nuclear magnetic resonance method (NMR) that this compound was DPCPQ. 3.2 g of the obtained DPCPQ was refined by sublimation at 380 °C under the following conditions: the pressure was 5.6 Pa, and an argon flow rate was 3.0 mL/min. 0.8 g of DPCPQ was collected and the collection rate was 25 percent. The analysis result of DPCPQ by proton nuclear magnetic resonance spectrometry (1HNMR) was as follows. 1HNMR (CDCl3, 300 MHz): delta =7.32-7.37 (m, 4H), 7.42-7.47 (m, 8H), 7.57-7.60 (m, 4H), 7.69-7.81 (m, 17H), 7.88-7.94 (m, 6H), 8.29-8.32 (m, 2H), 8.42-8.42 (m, 3H). FIG 8A is a 1HNMR chart of DPCPQ, and FIG. 8B is an enlarged 1HNMR chart of DPCPQ in 7.0 to 9.0 ppm.
 

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