Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 345637-71-0, name is 2-(5-Methyl-3-(trifluoromethyl)-1H-pyrazol-1-yl)acetic acid, This compound has unique chemical properties. The synthetic route is as follows., HPLC of Formula: C7H7F3N2O2
To a solution of 4-{4-[5-(2,6-difluorophenyl)-4,5-dihydroisoxazol-3-yl]thiazol-2-yl}piperazine-2-carboxylic acid methyl ester hydrochloride (0.5 g, 1.0 mmol) in 4 ml of N,Ndimethylformamide were added at 0C sequentially ethyl(diisopropyl)amine (0.3 g, 2.5 mmol), (5-methyl-3-trifluoromethyl-pyrazol-1-yl)acetic acid (0.2 g, 1.1 mmol) and benzotriazol-1-yloxy-tris(dimethylamino)phosphonium hexafluorophosphate (0.5 g, 1 .1 mmol). The reaction mixture was stirred for 16 h at room temperature, then poured on waterand extracted with ethyl acetate. The combined organic layer was washed with saturated aqueous sodium bicarbonate solution and brine, dried over sodium sulfate and evaporated. The residue is purified by column chromatography on silica gel (cyclohexane / ethyl acetate 4:1) to give 4-{4-[5-(2,6-difluoro-phenyl)-4,5-dihydro-isoxazol-3-yl]thiazol-2-yl}-1-[2-(5-methyl-3-trifluoromethyl-pyrazol-1-yl)acetyl]piperazine-2-carboxylic acid methyl ester (compound I.az.038)as light yellow foam. 1H-NMR (400 MHz, CDCl3): delta = 2.31 (s, 3H), 3.12(t, 1H), 3.34 (dd, 1H), 3.53 (dd, 1H), 3.64 – 3.76 (m, 4H), 3.89 (dd, 1H), 4.20 (dt, 1H), 4.44 (dd, 1H), 4.97 (dd, 1H), 5.22 (dd, 1H), 6.02 (t, 1H), 6.33 (d, 1H), 6.91 (t, 2H), 7.02 (s, 1H), 7.29 (q, 1H). MS:m/z = 599 (M+1).
Chemical properties determine the actual use. Each compound has specific chemical properties and uses. We look forward to more synthetic routes in the future to expand reaction routes of 345637-71-0.
Reference:
Patent; SYNGENTA PARTICIPATIONS AG; LAMBERTH, Clemens; SULZER-MOSSE, Sarah; CEDERBAUM, Fredrik; UMARYE, Jayant; SONAWANE, Ravindra; WO2013/127784; (2013); A1;,
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