In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 35277-02-2, name is 4-Fluoro-1H-pyrazole belongs to pyrazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below. 35277-02-2
3-(3-(4-(chloromethyl)benzyl)isoxazol-5-yl)pyridin-2 -amine (Intermediate B, 80mg, 0.27mmol) and 4-fluoro-lH-pyrazole (92mg, l .07mmol) were dissolved in NMP (lml). Potassium 2-methylpropane- 2-olate (1M in THF, 0.80mL, 0.80mmol) was added and the mixture was stirred for 5min at 60C. The cooled reaction mixture was directly purified by column chromatography (Si02, hexane/ethyl acetate). Fraction containing the product were concentrated under reduced pressure and further purified by HPLC to yield 3-(3-(4-((4-fluoro-lH-pyrazol-l-yl)methyl)benzyl)isoxazol-5-yl)pyridin-2-amine (75mg, 0.22mmol, 80%) as a white solid. 400 MHz NMR (CDCl3) d 8.14 (s, 1H), 7.69 (dd, J= 7.7, 1.7 Hz, 1H), 7.35 (dd, J= 4.3, 0.8 Hz, 1H), 7.31 – 7.13 (m, 5H), 6.70 (dd, J= 7.7, 4.7 Hz, 1H), 6.24 (s, 1H), 5.43 (s, 2H), 5.18 (s, 2H), 4.04 (s, 2H). MS: 350.3 [M+H]+.
The synthetic route of 35277-02-2 has been constantly updated, and we look forward to future research findings.