Réaction #1833209

Équation de réaction

water

pyridine

3-((3,3,3-trifluoropropyl)thio) propanoyl chloride

3-chloro-N-ethyl-1-(pyridin-3-yl)-1H-pyrazol-4-amine

→

desired product

Rendement 89.0%

N-(3-chloro-1-(pyridin-3-yl)-1H-pyrazol-4-yl)-N-ethyl-3-((3,3,3-trifluoropropyl)thio)propanamide

Rendement 89.0%

Solvants

CH2Cl2

Conditions de réaction

Traitement

1. 1
   workup.STIRRINGthe resulting mixture was stirred for five minutes
2. 2
   AutreThe mixture was transferred to a separatory funnel
3. 3
   Autrethe layers were separated
4. 4
   ExtractionThe aqueous phase was extracted with CH2Cl2 (3×50 mL)
5. 5
   Séchagethe combined organic extracts were dried over sodium sulfate (Na2SO4)
6. 6
   Filtrationfiltered
7. 7
   Concentrationconcentrated in vacuo
8. 8
   AutreThe crude product was purified via normal phase flash chromatography (0% to 100% EtOAc/CH2Cl2)

Mode opératoire

To a solution of 3-chloro-N-ethyl-1-(pyridin-3-yl)-1H-pyrazol-4-amine (prepared as described in the U.S. Publication No. 2012/0110702 to Yap et al.) (10 g, 44.9 mmol) in CH2Cl2 (100 mL) at a temperature of about 0° C. and under N2 was added pyridine (5.45 mL, 67.4 mmol), 4-dimethylaminopyridine (DMAP) (2.74 g, 22.45 mmol), and 3-((3,3,3-trifluoropropyl)thio) propanoyl chloride (9.91 g, 44.9 mmol), sequentially. The reaction was warmed to room temperature and stirred for one hour. The reaction mixture was poured into water (100 mL), and the resulting mixture was stirred for five minutes. The mixture was transferred to a separatory funnel, and the layers were separated. The aqueous phase was extracted with CH2Cl2 (3×50 mL), and the combined organic extracts were dried over sodium sulfate (Na2SO4), filtered, and concentrated in vacuo. The crude product was purified via normal phase flash chromatography (0% to 100% EtOAc/CH2Cl2) to provide the desired product as a pale yellow solid (17.21 g, 89%): IR (thin film) 1659 cm−1; 1H NMR (400 MHz, CDCl3) δ 8.95 (d, J=2.6 Hz, 1H), 8.63 (dd, J=4.7, 1.3 Hz, 1H), 8.05 (ddd, J=8.3, 2.7, 1.4 Hz, 1H), 7.96 (s, 1H), 7.47 (dd, J=8.3, 4.8 Hz, 1H), 3.72 (q, J=7.1 Hz, 2H), 2.84 (t, J=7.2 Hz, 2H), 2.66 (m, 2H), 237 (t, J=7.2 Hz, 2H), 2.44 (m, 2H), 1.17 (t, J=7.2 Hz, 3H); ESIMS m/z 409 ([M+2H]+).

Source