Hydrazine hydrate (1:1) → (R)-4-(1-(2-aminopropyl)-1H-pyrazol-3-yl)-2-(trifluoromethyl)benzonitrile

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Reaction Steps

(R)-4-(1-(2-(1,3-dioxoisoindolin-2-yl)propyl)-1H-pyrazol-3-yl)-2-(trifluoromethyl)benzonitrile (0.199 g, 0.469 mmol) was mixed with ethanol (15 ml). Hydrazine hydrate (0.227 ml, 4.69 mmol) was added and the mixture was refluxed for 3 h. After cooling to RT the precipitate was filtered and washed with ethanol. The filtrate was purified with CombiFlash using DCM and methanol as eluents. Drying in the vacuum afforded 0.080 g of the title product. 1H-NMR (400 MHz; d6-DMSO): δ 0.96 (d, 3H), 3.21-3.29 (m, 2H), 4.01-4.03 (m, 2H), 7.05 (d, 1H), 7.88 (d, 2H), 8.18 (d, 1H), 8.26-8.28 (m, 1H), 8.31 (s, 1H).

Provenance & Evidence