Biphenyl derivative compound as well as preparation method and application thereof
A technology of derivatives and compounds, applied in the preparation of organic compounds, chemical instruments and methods, drug combinations, etc., can solve problems such as reports of unseen structures, and achieve good weight loss effects and good therapeutic effects
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Embodiment 1
[0025] Embodiment 1, the preparation of compound 1
[0026] (1) Synthesis of 2'-methoxy-5'-nitro-[1,1':3',1'-terphenyl]-3,3"-dicarboxylic acid:
[0027]
[0028] 1,3-Dibromo-2-methoxy-5-nitrobenzene (12.18g, 0.039mol), 4-carboxyphenylboronic acid (13.61g, 0.082mol), 2M sodium carbonate solution (40.0mL) and tetrakis(triphenylphosphino)palladium (2.79g) were added into dioxane (90.0mL) solution, under the protection of nitrogen, stirred and heated to reflux for 24 hours. After cooling the reaction mixture was filtered and the solid was slurried in 6M aqueous hydrochloric acid (100 mL) for half an hour. Filtration, the filter cake was fully washed with water, and then washed with ether to obtain a dark yellow solid 2'-methoxy-5'-nitro-[1,1':3',1'-terphenyl]-3,3" - Dicarboxylic acid, 7.44 g, 48.5% yield.
[0029] 1 H-NMR (400MHz, CDCl 3 )δ: 4.16(s,3H), 7.72(t,2H), 7.85(d,2H), 8.11(s,2H), 8.26(d,2H), 8.70(s,2H). 13 C-NMR (125MHz, CDCl 3 )δ: 60.70, 124.51, 128.45, 130.29,...
Embodiment 2
[0041] The synthesis of embodiment 2, compound 2
[0042]
[0043] 5'-amino-2'-hydroxyl-[1,1':3',1"-terphenyl]-3,3"-dicarboxylic acid (10g, 0.0286mol), 2-chloro-N-(4 -Ethoxy-3-methoxyphenethyl)acetamide (23.37g, 0.086mol), sodium iodide (12.14g, 0.081mol) and potassium carbonate (18.66g, 0.135mol) were suspended in dimethylformaldehyde amide (60 mL) and stirred at 50°C for 48 hours. The solvent was concentrated under reduced pressure, the crude product was dissolved in water (80 mL), the pH was adjusted to 2.0 with hydrochloric acid, and dichloromethane (4×40 mL) was added for extraction. The combined organic phases were dried over anhydrous sodium sulfate, filtered and concentrated to dryness under reduced pressure. The crude product was purified by column chromatography (eluent: EA:acetone=1:1). 5'-((2-((4-ethoxy-3-methoxyphenethyl)amino)-2-oxoethyl)amino)-2'-hydroxy-[1,1 ':3',1"-biphenyl]-3,3"-dicarboxylic acid (compound 2), 10.94g, yield 65.4%.
Embodiment 3
[0044] The synthesis of embodiment 3, compound 3
[0045]
[0046] 5'-amino-2'-hydroxy-[1,1':3',1"-terphenyl]-3,3"-dicarboxylic acid (10g, 0.0286mol), 2-chloro-N-(3 ,4-diethoxyphenethyl)acetamide (24.58g, 0.086mol), sodium iodide (12.14g, 0.081mol) and potassium carbonate (18.66g, 0.135mol) were suspended in dimethylformamide (60mL ) and stirred at 50°C for 48 hours. The solvent was concentrated under reduced pressure, the crude product was dissolved in water (80 mL), the pH was adjusted to 2.0 with hydrochloric acid, and dichloromethane (4×40 mL) was added for extraction. The combined organic phases were dried over anhydrous sodium sulfate, filtered and concentrated to dryness under reduced pressure. The crude product was purified by column chromatography (eluent: EA:acetone=1:1). 5'-((2-((3,4-diethoxyphenethyl)amino)-2-oxoethyl)amino)-2'-hydroxy-[1,1':3 ',1"-biphenyl]-3,3"-dicarboxylic acid (compound 3), 12.24 g, yield 71.5%.
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