Nitrogen → HCID 21082125, compound

Participants

Reaction Steps

Part A: A magnetically stirred mixture of N-(4-chlorophenyl)-2,4-dichlorobenzenecarboxamidine (10.0 gram, 0.033 mol), 2-chloroacrylonitrile (5.7 gram, 0.065 mol) and N,N-diisopropylethylamine (DIPEA) (12.5 ml, 0.069 mol) in tetrahydrofuran (150 ml) is heated at reflux temperature for 40 hours (N2 atmosphere). After cooling to room temperature the mixture is concentrated in vacuo. The residue is dissolved in a mixture of dichloromethane and water (200 ml/200 ml). The dichloromethane layer is collected, dried over MgSO4, filtered and concentrated in vacuo. The residue is recrystallised from ethanol/water to give 1-(4-chlorophenyl)-2-(2,4-dichlorophenyl)-4,5-dihydro-1H-imidazole-4-carbonitrile (11.23 gram, 97% yield). 1H-NMR (400 MHz, CDCl3): δ 4.28 (dd, J=10 and 8 Hz, 1H), 4.36 (t, J=10 Hz, 1H), 5.07 (dd, J=10 and 8 Hz, 1H), 6.68 (br d, J=8 Hz, 2H), 7.16 (br d, J=8 Hz, 2H), 7.32–7.36 (m, 2H), 7.45 (d, J=8 Hz, 1H).

Provenance & Evidence