Application of 38557-72-1, Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 38557-72-1, name is 2-Chloro-3,5-dimethylpyrazine, This compound has unique chemical properties. The synthetic route is as follows.
Example 2Synthesis Example 2Example 2 gives a specific example of the synthesis of the organometallic complex represented by the structural formula (130) in Embodiment 1 which is one embodiment of the present invention, tris[3,5-dimethyl-2-(4-phenoxyphenyl)pyrazinato]iridium(III) (abbreviation: [Ir(dmpoppr)3]). A structure of [Ir(dmpoppr)3] is illustrated below. Synthesis of Tris[3,5-dimethyl-2-(4-phenoxyphenyl)pyrazinato]iridium(III) (abbreviation: [Ir(dmpoppr)3])First, 1.42 g of the ligand prepared in Step 1 in Synthesis Example 1 above, Hdmpoppr, and 0.50 g of tris(acetylacetonato)iridium(III) were placed into a reaction container provided with a three-way cock, and the air in the reaction container was replaced with argon. After that, the mixture was heated at 250 C. for 43 hours to be reacted. The reactant was dissolved in dichloromethane, and this solution was filtered. After the solvent of the filtrate was distilled and the obtained residue was washed with ethyl acetate and then with methanol, recrystallization from dichloromethane gave the organometallic complex which is one embodiment of the present invention, [Ir(dmpoppr)3] (an orange powder in a yield of 22%). The synthesis scheme is illustrated in the following formulae (f). The results of the nuclear magnetic resonance (1H NMR) spectroscopy, by which the orange powder obtained above was analyzed, are shown below. In addition, a 1H-NMR chart is shown in FIG. 12. These results revealed that the organometallic complex represented by the above-described structural formula (130) which is one embodiment of the present invention, [Ir(dmpoppr)3], was obtained in Synthesis Example 2.1H NMR. delta (CDCl3): 2.38 (s, 9H), 2.97 (s, 9H), 6.31 (d, 3H), 6.47 (dd, 3H), 6.82 (d, 6H), 7.02 (t, 3H), 7.15 (s, 3H), 7.21 (t, 6H), 7.81 (d, 3H).Next, an ultraviolet-visible absorption spectrum (hereinafter, simply referred to as an ?absorption spectrum?) of a dichloromethane solution of [Ir(dmpoppr)3] and an emission spectrum thereof were measured. The measurement of the absorption spectrum was conducted at room temperature, for which an ultraviolet-visible light spectrophotometer (V550 type manufactured by Japan Spectroscopy Corporation) was used and the dichloromethane solution (0.083 mmol/L) was put in a quartz cell. In addition, the measurement of the emission spectrum was conducted at room temperature, for which a fluorescence spectrophotometer (FS920 manufactured by Hamamatsu Photonics Corporation) was used and the degassed dichloromethane solution (0.50 mmol/L) was put in a quartz cell. Measurement results of the obtained absorption and emission spectra are shown in FIG. 13, in which the horizontal axis represents wavelength and the vertical axis represents absorption intensity and emission intensity. In FIG. 13 where there are two solid lines, the thin line represents the absorption spectrum and the thick line represents the emission spectrum. Note that the absorption spectrum in FIG. 13 is the results obtained in such a way that the absorption spectrum measured by putting only dichloromethane in a quartz cell was subtracted from the absorption spectrum measured by putting the dichloromethane solution (0.083 mmol/L) in a quartz cell.As shown in FIG. 13, the organometallic complex of one embodiment of the present invention, [Ir(dmpoppr)3], has an emission peak at 561 nm, and yellow light emission was observed from the dichloromethane solution.
The chemical industry reduces the impact on the environment during synthesis 2-Chloro-3,5-dimethylpyrazine. I believe this compound will play a more active role in future production and life.
Reference:
Patent; Semiconductor Energy Laboratory Co., Ltd.; US2012/95226; (2012); A1;,
Pyrazine – Wikipedia,
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