1,8-Diazabicyclo(5.4.0)undec-7-ene → HCID 59726785, compound

Participants

Reaction Conditions

Reaction Steps

4,4,4-Trifluoro-1-[1-(3-trifluoromethyl-pyridin-2-yl)-1H-pyrazol-4-yl]-butane-1,3-dione (143 mg, 0.41 mmol) and 2-cyano-N-(2,4-difluoro-benzyl)-acetamide (86 mg, 0.41 mmol) were suspended in 1.5 mL anhydrous benzene. To the above reaction mixture was added 1,8-diazabicyclo[5,4,0]undec-7-ene (DBU (31 mg, 0.21 mmol). The mixture was heated at 90° C. under nitrogen atmosphere for overnight. After this period of time, the mixture was evaporated in vacuo and the resulting residue was purified by column chromatography on silica gel (35% EtOAC/Hexane) to give 1-(2,4-difluoro-benzyl)-2-oxo-4-trifluoromethyl-6-[1-(3-trifluoromethyl-pyridin-2-yl)-1H-pyrazol-4-yl]-1,2-dihydro-pyridine-3-carbonitrile as a yellow solid (78 mg, 36% yield). 1H-NMR (400 MHz, CDCl3): δ 5.42 (s, 2H), 6.61 (s, 1H), 6.82 (m, 1H), 6.89 (m, 1H), 7.12 (m, 1H), 7.58 (dd, 1H, J=4.80, J=8.08), 7.73 (s, 1H), 8.28 (dd, 1H, J=1.77, J=8.08), 8.32 (s, 1H), 8.72 (dd, 1H, J=1.77, J=4.80).

Provenance & Evidence