Diethyl (cyanomethyl)phosphonate → 4-chloro-N-{[4-chloro-3-({3-chloro-5-[(E)-2-cyanoethenyl]phenyl}oxy)-2-fluorophenyl]methyl}-1-({[2-(trimethylsilyl)ethyl]oxy}methyl)-1H-imidazole-5-carboxamide

Participants

Reaction Conditions

Reaction Steps

To a solution of diethyl cyanomethylphosphonate (56.1 mg, 0.317 mmol) in THF (5 mL) at 0° C. was added potassium t-butoxide (1.0 M solution in THF) (0.317 ml, 0.317 mmol) and the mixture was stirred at 0° C. for 30 minutes. Next, 4-chloro-N-({4-chloro-3-[(3-chloro-5-formylphenyl)oxy]-2-fluorophenyl}methyl)-1-({[2-(trimethylsilyl)ethyl]oxy}methyl)-1H-imidazole-5-carboxamide (165 mg, 0.288 mmol) was added and the reaction mixture was stirred at room temperature for 2 hours. The mixture was diluted with EtOAc and washed with water. The solvent was removed and the crude material was purified via silica gel chromatography to give 4-chloro-N-{[4-chloro-3-({3-chloro-5-[(E)-2-cyanoethenyl]phenyl}oxy)-2-fluorophenyl]methyl}-1-({[2-(trimethylsilyl)ethyl]oxy}methyl)-1H-imidazole-5-carboxamide (113 mg, 0.190 mmol, 66% yield). 1H NMR (400 MHz, DMSO-d6) δ ppm 8.74 (t, 1H), 7.95 (s, 1H), 7.54 (d, 2H), 7.41-7.48 (m, 1H), 7.36 (t, 1H), 7.23 (s, 1H), 6.97 (s, 1H), 6.58 (d, 1H), 5.47 (s, 2H), 4.45 (d, 2H), 3.36 (t, 2H), 0.72 (t, 2H), −0.12 (s, 9H).

Provenance & Evidence