1,1'-Carbonyldiimidazole → HCID 11004640, compound

Participants

Reaction Conditions

Reaction Steps

N-(5-Chloro-2-methoxyphenyl)-3,5-bis(trifluoromethyl) benzene carbohydrazonamide (4 g, 9.7 mmol) was taken up in THF (600 ml) under N2.and 1,1'-carbonyldiimidazole (1.9 g, 11.72 mmol) added. The solution was stirred for 18 h at 24° C. before solvent was removed by rotary evaporation. The residue was taken up in ethyl acetate (400 ml) and washed with 0.1N HCl solution (100 ml), water (100 ml) and brine prior to drying over MgSO4. Recrystallization from acetonitrile gave 2.92 g (68.6%) mp 205.5-207° C. IR(KBr, υ=cm-1) 3170, 3057, 1726, 1504, 1277, 1128; 1H NMR (300 MHz, DMSO-d6) δ 3.48 (3H, s), 7.15 (1H, d, J=9.0 Hz), 7.55 (1H, dd, J=8.9 Hz, 2.6Hz), 7.69 (1H, d, J=2.6 Hz), 7.87 (2H, br.s), 8.17 (1H, br.s), 12.50 (1H, br.s); MS(DCl)mtz: 438(MH+).

Provenance & Evidence