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. 852443-61-9, name is 3-(Trifluoromethyl)-1H-pyrazol-5-amine, A new synthetic method of this compound is introduced below., Application In Synthesis of 3-(Trifluoromethyl)-1H-pyrazol-5-amine
General procedure: 4.1.1.1. General procedure. An equimolar mixture of compound 3, 7a-c and N-(4-acetylphenyl)-2-bromoacetamide 9 (0.25 g,1 mmol) in acetonitrile (50 ml) and TEA (0.10 g, 1.2 mmol) was heated at reflux for 4-8 h. The reaction mixture was evaporated to dryness. The residue was crystallized from aqueous ethanol affording products 10a-d. 4.1.1.1.1. N-(4-acetylphenyl)-2-(5-amino-3-(trifluoromethyl)-1H-1,2,4-triazol-1-yl)acetamide. (10a). White powder (0.25 g, 75%yield), m. p. 240-242 C, IR (KBr) max (cm1) 3180-3470 (NH,NH2), 1715 (COCH3), 1650 (CONH); 1HNMR (400 MHz, DMSO-d6)d (ppm): 2.54 (s, 3H, CH3), 4.89 (s, 2H, CH2), 6.84 (s, 2H, NH2), 7.67(d, 2H, J 8.8 Hz, Ar-H), 7.93 (d, 2H, J 8.8 Hz, Ar-H), 10.67 (s, 1H,NH); 13C NMR (100 MHz, DMSO-d6) d 26.91, 50.21, 118.91, 121.35,123.20, 125.46, 130.08, 132.50, 143.24, 149.40, 149.78, 158.34,165.43, 197.06; HRMS (ESI) m/z: [M H]- calc 326.0943; found 326.0876 for C13H12F3N5O2.
The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.
Reference:
Article; El-Sherief, Hany A.M.; Youssif, Bahaa G.M.; Abbas Bukhari, Syed Nasir; Abdelazeem, Ahmed H.; Abdel-Aziz, Mohamed; Abdel-Rahman, Hamdy M.; European Journal of Medicinal Chemistry; vol. 156; (2018); p. 774 – 789;,
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