Some common heterocyclic compound, 345637-71-0, name is 2-(5-Methyl-3-(trifluoromethyl)-1H-pyrazol-1-yl)acetic acid, molecular formula is C7H7F3N2O2, 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. HPLC of Formula: C7H7F3N2O2
To a solution of 2-[5-methyl-3-(trifluoromethyl)pyrazol-1-yl]acetic acid (2.75 g, 0.013 mol) in N, N-dimethylforamide (22 ml), 1-[bis(dimethylamino)methylene]-1 H-1,2,3-triazolo[4,5-b]pyridinium 3-oxid hexafluorophosphate (5.27 g, 0.014 mol), 3-methylsulfanylpiperidine- 4-carbonitrile hydrochloride (2.55 g, 0.013 mol) and triethylamine (5.52 ml, 0.04 mol) at 0C was added and allowed to stirred at room temperature for 3 hrs. After completion of reaction, the reaction mixture was diluted with water extracted with ethyl acetate. The organic layerwas washed with water, brine and dried over sodium sulphate. Organic layer was concentrated to dryness. The residue was washed with diethyl ether afforded 3.5 g of 3-methylsulfanyl-1-[2-[5-methyl-3-(trifluoromethyl)pyrazol-1-yl]acetyl]pi peridine-4-carbonitrile.MS: m/z = 347 (M+1).
These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 345637-71-0, its application will become more common.
Reference:
Patent; SYNGENTA PARTICIPATIONS AG; LAMBERTH, Clemens; SULZER-MOSSE, Sarah; CEDERBAUM, Fredrik; UMARYE, Jayant; SONAWANE, Ravindra; WO2013/127808; (2013); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics