As we all know, there are many different methods for the synthesis of a compound, and people can choose the synthesis method that suits their own laboratory according to the actual situation. 767-91-9 name is 2′-Methoxyphenyl acetylene, This compound is widely used in many fields, so it is necessary to find a new synthetic route. The downstream synthesis method of this compound is introduced below. 767-91-9
5b) 2-isopropoxy-5-(2-methoxy-phenylethynyl)-benzoic acid methyl ester 5-lodo-2-isopropoxy-benzoic acid methyl ester (500 mg), 2-methoxy-phenyl acetylene (0.40 ml), palladium dichlorobis(triphenylphosphine) (12 mg) and Cul (6 mg) in diethylamine (10 ml) were stirred at 60C for 12 hours. The reaction mixture was concentrated and extracted with ethylacetate / water. The combined organic layers were dried over sodium sulphate and the solvent was evaporated. The title compound was obtained in 64 % yield after flash chromatography. 1H-NMR (CDCl3): 7.97 d (J = 2.3 Hz, 1 H); 7.59 dd (J = 2.3 Hz / 8.7 Hz, 1 H); 7.47 dd (J = 7.5 Hz / 1.7 Hz, 1 H); 7.30 m (1 H); 6.96 m (3H); 4.62 m (1 H); 3.91 s (3H); 3.88 s (3H); 1.38 d (J = 8.7 Hz, 6H).
At the same time, in my other blogs, there are other synthetic methods of this type of compound, 2′-Methoxyphenyl acetylene, and friends who are interested can also refer to it.
Reference:
Patent; Bayer Schering Pharma Aktiengesellschaft; EP1985612; (2008); A1;,
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