Electric Literature of 13273-53-5,Some common heterocyclic compound, 13273-53-5, name is 4-Bromo-1-methyl-1H-1,2,3-triazole, molecular formula is C3H4BrN3, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.
A mixture of 2-((4-chlorophenethyl)amino)-2-phenyl-l-(6-(4,4,5,5-tetramethyl- l,3,2-dioxaborolan-2-yl)-lH-indol-3-yl)ethan-l-one (0.06 g, 0.11 mmol), 4-bromo-l -methyl – 1H- 1,2, 3 -triazole (0.019 g, 0.11 mmol), and cesium carbonate (0.095 g, 0.29 mmol) in a mixture of 4:1 dioxane:water (5 ml) was degassed for 20 minutes with argon. S-Phos Pd precatalyst G3 (0.009 g, 0.01 mmol) was added and degassing was continued for another 10 minutes. The reaction mixture was heated in a sealed tube with microwave heating at 135 C for 1 hour. After completion of the reaction (monitored by TLC), the reaction mixture was treated with water (15 ml) and extracted with ethyl acetate (2 x 15 ml). The combined organic layers were washed with brine, dried over anhydrous Na2S04 and concentrated under reduced pressure. The residue was purified by silica gel chromatography to afford the title compound as solid (0.040 g, 74%) in racemic form.
These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 4-Bromo-1-methyl-1H-1,2,3-triazole, its application will become more common.
Reference:
Patent; CONSTELLATION PHARMCEUTICALS, INC.; WILSON, Jonathan, E.; LEVELL, Julian, R.; (152 pag.)WO2019/161157; (2019); A1;,
1,2,3-Triazole – Wikipedia,
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