Electric Literature of 741717-63-5, A common heterocyclic compound, 741717-63-5, name is Ethyl 1-phenyl-3-(trifluoromethyl)-1H-pyrazole-4-carboxylate, molecular formula is C13H11F3N2O2, 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.
A mixture of ethyl l-phenyl-3- (trifluoromethyl) -IH- pyrazole-4-carboxylate (6.60 g, 23.2 mmol) and ethylenediamine (50 ml, 23.2 mmol) was heated at reflux for 3 hours. The mixture was concentrated under reduced pressure to a residue. To the residue was added toluene (50 mL) that was concentrate off, twice. The crude solid was dried under high vacuum overnight to give N- (2-aminoethyl) -l-phenyl-3-(trifluoromethyl) -lH-pyrazole-4-carboxamide (6.9 g, 99% yield) as a light tan solid. The desired product may also be isolated as the hydrochloride salt by dissolving in minimal DCM and adding IN HCl in Et2theta (3-5 molar equivalents) dropwise, filtering the solid and washing with Et2theta. 1H NMR (Free base analog) (DMSO-d6) delta 1.83 (br, 2H), 2.68 (t, J = 6.3 Hz, 2H), 3.21-3.26 (m, 2H), 7.47 (t, J = 7.4 Hz, IH), 7.60 (t, J = 8.0 Hzr 2H), 7.84 (d, J = 7.8 Hz, 2H), 8.29-8.30 (m, IH), 9.11 (s, IH); m/z (APCI pos) 299 (60%) (M+H) .
The synthetic route of 741717-63-5 has been constantly updated, and we look forward to future research findings.