Reaktion #1569603

Reaktionsgleichung

Iodoethane

cesium carbonate

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

N,N-dimethylformamide

→

oil

Ausbeute 66.4%

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

Ausbeute 66.4%

Lösungsmittel

ethyl acetate

water

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeA 100 mL, 3-neck round bottom flask, equipped with mechanical stirrer
2. 2
   ExtraktionIt was extracted with ethyl acetate (2×20 mL)
3. 3
   Einengenthe combined organic layer was concentrated to dryness at <40° C
4. 4
   SonstigeThe residue was purified by flash column chromatography
5. 5
   workup.ADDITIONThe fractions containing pure product
6. 6
   Einengenwere concentrated to dryness

Vorschrift

A 100 mL, 3-neck round bottom flask, equipped with mechanical stirrer, temperature probe and nitrogen inlet was charged with cesium carbonate (654 mg, 2.01 mmol), N-(3-chloro-1-(pyridin-3-yl)-1H-pyrazol-4-yl)-3-((3,3,3-trifluoropropyl)thio)propanamide (380 mg, 1.00 mmol) and N,N-dimethylformamide (5 mL). Iodoethane (0.0890 mL, 1.10 mmol) was added dropwise. The reaction was stirred at 40° C. for 2 hours, at which point thin layer chromatography analysis (Eluent: ethyl acetate) indicated that only a trace of starting material remained. The reaction mixture was cooled to 20° C. and water (20 mL) was added. It was extracted with ethyl acetate (2×20 mL) and the combined organic layer was concentrated to dryness at <40° C. The residue was purified by flash column chromatography using 0-100% ethyl acetate/hexanes as eluent. The fractions containing pure product were concentrated to dryness to afford a colorless oil (270 mg, 66%): mp 79-81° C.; 1H NMR (400 MHz, DMSO-d6) δ 9.11 (d, J=2.7 Hz, 1H), 8.97 (s, 1H), 8.60 (dd, J=4.8, 1.4 Hz, 1H), 8.24 (ddd, J=8.4, 2.8, 1.4 Hz, 1H), 7.60 (ddd, J=8.4, 4.7, 0.8 Hz, 1H), 3.62 (q, J=7.1 Hz, 2H), 2.75 (t, J=7.0 Hz, 2H), 2.66-2.57 (m 2H), 2.57-2.44 (m, 2H), 2.41 (t, J=7.0 Hz, 2H), 1.08 (t, J=7.1 Hz, 3H); EIMS m/z 406 ([M]+).

Quelle