1,8-Diazabicyclo(5.4.0)undec-7-ene → ethyl 3-chloro-4-(2-(5-(2-(4-chloro-3-methoxyphenyl)propan-2-yl)-1-(4-fluorophenyl)-1H-imidazol-2-yl)vinyl)-5-fluorobenzoate

Participants

Reaction Conditions

Reaction Steps

To a mixture of 5-(2-(4-chloro-3-methoxyphenyl)propan-2-yl)-1-(4-fluorophenyl)-1H-imidazole-2-carbaldehyde (304 mg, 0.815 mmol) and (2-chloro-4-(ethoxycarbonyl)-6-fluorobenzyl)triphenylphosphonium bromide (454 mg, 0.815 mmol) in MeCN (5 mL) was added dropwise DBU (136 mg, 0.896 mmol). After stirring at 50° C. overnight, the mixture was diluted with H2O and extracted with DCM. The combined extracts were dried (MgSO4), filtered, concentrated and purified by flash chromatography (20-90% EtOAc/hexanes) to yield ethyl 3-chloro-4-(2-(5-(2-(4-chloro-3-methoxyphenyl)propan-2-yl)-1-(4-fluorophenyl)-1H-imidazol-2-yl)vinyl)-5-fluorobenzoate (0.241 g, 51%) as a yellow oil. 1H NMR (400 MHz, DMSO-d6) δ 8.05-7.87 (m, 3H), 7.85-7.58 (m, 13H), 7.20 (tt, J=15.1, 7.1 Hz, 1H), 5.21 (d, J=15.0 Hz, 2H), 4.34 (dq, J=14.2, 7.1 Hz, 2H), 1.33 (dt, J=14.2, 7.1 Hz, 3H).

Provenance & Evidence