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. 16681-65-5, name is 1-Methyl-1H-1,2,3-triazole, This compound has unique chemical properties. The synthetic route is as follows., 16681-65-5
Intermediate 19: step a (2,6-dimethylpyridin-3-yl)(1-methyl-1H-1,2,3-triazol-5-yl)methanol A solution of n-butyllithium in hexanes (2,5 M, 22,5 mL, 56.3 mmol) was added dropwise by syringe to a stirring solution of 1 -methyl- IH- 1 ,2,3-triazole (5.00 g, 60.2 mmol, prepared according to PCX Int. AppL, 2008098104) in dry tetrahydrofuran (400 mL) at -55 C. The resulting off-white slurry was stirred at -45 C for 20 minutes, whereupon a solution of 2,6- dimethyl-pyridine-3-carbaldehyde (8.33 g, 61 .7 mmol) in dry tetrahydrofuran (10 mL) was added dropwise by syringe. After 5 minutes, the cooling bath was removed and the reaction mixture was allowed to slowly warm. After 45 minutes, saturated aqueous ammonium chloride solution (10 mL) and ethyl acetate (100 mL) were added. The mixture was concentrated by- rotary evaporation. The residue was dissolved in ethyl acetate (300 mL). The organic solution was washed with saturated aqueous sodium chloride solution (100 mL, containing excess solid sodium chloride). The aqueous layer was extracted with ethyl acetate (2 x 100 mL). The organic layers were combined and the combined solution was concentrated. Ether (100 mL) was added to the residue and the mixture was sonicated for 20 minutes during which time a white solid crashed out. The solids were collected by filtration. Ether (100 mL) was added to the collected solids and the mixture sonicated a second time. After 20 minutes, the mixture was filtered and the solids were collected to provide the title compound as a fine powder.
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Reference:
Patent; JANSSEN PHARMACEUTICA NV; LEONARD, Kristi A.; BARBAY, Kent; EDWARDS, James P.; KREUTTER, Kevin D.; KUMMER, David A.; MAHAROOF, Umar; NISHIMURA, Rachel; URBANSKI, Maud; VENKATESAN, Hariharan; WANG, Aihua; WOLIN, Ronald L.; WOODS, Craig R.; FOURIE, Anne; XUE, Xiaohua; CUMMINGS, Maxwell D.; JONES, William Moore; GOLDBERG, Steven; WO2015/57205; (2015); A1;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics