Synthetic Route of 20154-03-4, These common heterocyclic compound, 20154-03-4, name is 3-(Trifluoromethyl)-1H-pyrazole, 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.
NaH (33.08 g (19.85, 60percent), 1.5 equiv.) was added to a small amount of n-hexane and the mixture was stirred for 10 minutes. The n-hexane was decanted, dry DMF (500 mL) was added under an N2 atmosphere and the mixture was stirred. A solution of the product obtained in step b (75 g, 550 mmol) in DMF (125 mL) was added dropwise under an N2 atmosphere. A solution of 4-methoxyl benzoyl chloride (86.3 g, 550 mmol, 1 equiv.) in DMF (125 mL) was then added dropwise and the mixture was stirred for 12 h at RT and then poured into iced water (500 mL), and the mixture was extracted with EA (2.x.400 mL). The mixture was then dried over Na2SO4 and concentrated under reduced pressure, the crude product being obtained as a brown oil (125 g, 88percent yield).
Statistics shows that 3-(Trifluoromethyl)-1H-pyrazole is playing an increasingly important role. we look forward to future research findings about 20154-03-4.