Application of 52222-73-8, A common heterocyclic compound, 52222-73-8, name is 4-(Trifluoromethyl)-1H-pyrazole, molecular formula is C4H3F3N2, its 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.
To a stirred solution of 4-(trifluoromethyl)-1H-pyrazole (OH, 2.5 g, 18.43 mmol) in DMF (50 mL), CS2CO3 (9.0 g, 27.64 mmol) was added followed by 2-bromo-1-(4-fluorophenyl)ethan-1-one (CH, 4.0 g, 18.43 mmol) and the reaction mixture was stirred at RT for 1H. The progress of the reaction was monitored by TLC. After completion of the reaction, the reaction mixture was diluted with ice water and the aqueous layer was extracted with EtOAc. The combined organic layer was dried over anhydrous Na2S04 and concentrated under reduced pressure. The crude compound was purified by silica gel column chromatography (40% EtOAc/hexane) to afford compound OI (3.0 g, 60.0%) as a light yellow solid.1H NMR (400 MHz, DMSO-d6): _ 8.35 (s, 1H), 8.16-8.12 (m, 2H), 7.95 (s, 1H), 7.45 (t, J = 8.8 Hz, 2H), 5.95 (s, 2H); LC-MS: m/z 273.00 [M+H]+.
The synthetic route of 52222-73-8 has been constantly updated, and we look forward to future research findings.