1-(4-chloro-2-fluoro-5-propargyloxyphenyl)-5-chloro-4-cyano-3-propyl-1,3-dihydro-2 H-imidazol-2-one → 1-(4-chloro-2-fluoro-5-propargyloxyphenyl)-4,5-dicyano-3-propyl-1,3-dihydro-2H-imidazol-2-one

Participants

Reaction Conditions

Reaction Steps

The product of Example 2, 1-(4-chloro-2-fluoro5-propargyloxyphenyl)-5-chloro-4-cyano-3-propyl-1,3-dihydro-2H-imidazol-2-one (V) (0.25 g, 0.68 mmol), was stirred in 10 mL dimethylformamide (DMF). To this mixture was added LiCN (2 mL of 0.5M in DMF, 1 mmol) and the resulting mixture was heated to 120° C. for 15 minutes. The mixture was cooled poured onto water, extracted with ethyl acetate, dried, concentrated and eluted through silica gel (50:50 ethyl acetate:hexane) to give 0.11 g of 1-(4-chloro-2-fluoro-5-propargyloxyphenyl)-4,5-dicyano-3-propyl-1,3-dihydro-2H-imidazol-2-one (VI) (m.p. 76° C.).

Provenance & Evidence