Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 14521-80-3, name is 3-Bromo-1H-pyrazole, A new synthetic method of this compound is introduced below., Computed Properties of C3H3BrN2
Production Example 60 A mixture of 0.28 g of 2-(3-fluoropyridin-4-yl)-5-(trifluoromethyl)benzoxazole, 0.19 g of 3-bromopyrazole, 0.55 g of potassium carbonate and 2 ml of DMF was stirred while heating at 50C for 1.5 hours. Then, the reaction mixture was cooled to room temperature. Water was added to the reaction mixture, followed by extraction with ethyl acetate twice. The combined organic layers were washed with a saturated sodium chloride solution, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was subjected to silica gel column chromatography to give 0.31 g of 2-[3-(3-bromopyrazole-1-yl)pyridin-4-yl]-5-(trifluoromethyl)benzoxazole (hereinafter, referred to as “active compound 59”). [Show Image] 1H-NMR (CDCl3) delta: 8.92 (s, 1H), 8.89 (d, J=5.1 Hz, 1H), 8.16 (d, J=5.1 Hz, 1H), 8.08-8.07 (m, 1H), 7.69 (dd, J=8.8, 1.2 Hz, 1H), 7.66 (d, J=2.4 Hz, 1H), 7. 59 (d, J=8.8 Hz, 1H), 6.57 (d, J=2.4 Hz, 1H)
The synthetic route of 14521-80-3 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; Sumitomo Chemical Company, Limited; EP2274983; (2011); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics