Adding a certain compound to certain chemical reactions, such as: 6314-23-4, name is 2-(1-Pyrazolyl)ethanol, belongs to pyrazoles-derivatives compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 6314-23-4, COA of Formula: C5H8N2O
General procedure: A flame-dried Schlenk test tube with a magnetic stirring bar was charged with CuI (0.038 mg, 0.0002 mol), Cs2CO3 (0.65 g, 0.002 mol), heterocycle (0.0014mol), 1-bromo-4-methoxybenzene (0.185 g, 0.001 mol) and DMF (10 mL) under N2. A rubber septum was replaced with a glass stopper, and the system was then evacuated twice and back filled with N2. After being stirred at 120 C for 24 h, the reaction mixture was diluted with 2-3 mL of ethyl acetate, filtered through a plug of silica gel, and washed with 30-50 mL of ethyl acetate. The filtrate was concentrated and the resulting residue was purified by column chromatography on silica gel to provide the desired product. A solution of BBr3 (0.23 mL, 0.0025mol) in CH2Cl2 (5 mL) was added dropwise to the solution of 1-(4-methoxyphenyl)-1H-heterocycle (0.001 mol) in CH2Cl2 (10 mL) cooled to 0 C. The resulting solution was stirred for 4 h at room temperature. And the solution was washed by NaHCO3, NH4Cl, NaCl solution in sequence. The CH2Cl2 was dried over anhydrous sodium sulfate, removed under vacuum, and the residue was purified by chromatography on silica gel to yield the 4-(1H-heterocycle -1-yl)phenol.4-(1H-heterocycle -1-yl)phenol (0.001 mol), N,N?-dicyclohexyl carbodiimide (DCC) (0.0012 mol), 4-dimethylaminopyridine (DMAP) (0.0002 mol) in 10 mL chloroform were placed in a Pyrex glass tube, sealed and heated at 80 C for 12 h. After cooling to room temperature, the white solid was filtrated off, and the solvent was removed under vacuum. The crude product was purified by chromatography on silica gel with to gain the desired products.
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Reference:
Article; Hong, Fengying; Xia, Zhengce; Zhu, Dezhao; Wu, Hongxiang; Liu, Jianhui; Zeng, Zhuo; Tetrahedron; vol. 72; 10; (2016); p. 1285 – 1292;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics