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

HRID 465688Notes

Reaction equation

[Cl:1][C:2]1[C:7]([O:8][CH2:9][C:10]#[CH:11])=[CH:6][C:5]([N:12]2[C:16](Cl)=[C:15]([C:18]#[N:19])[N:14]([CH2:20][CH2:21][CH3:22])[C:13]2=[O:23])=[C:4]([F:24])[CH:3]=1.[Li][C:26]#[N:27]>CN(C)C=O>[Cl:1][C:2]1[C:7]([O:8][CH2:9][C:10]#[CH:11])=[CH:6][C:5]([N:12]2[C:16]([C:26]#[N:27])=[C:15]([C:18]#[N:19])[N:14]([CH2:20][CH2:21][CH3:22])[C:13]2=[O:23])=[C:4]([F:24])[CH:3]=1

Participants

Conditions

Temperature: 120 °C

Procedure

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.).

Workup

temperatureThe mixture was cooled
additionpoured onto water
extractionextracted with ethyl acetate
customdried
concentrationconcentrated
washeluted through silica gel (50:50 ethyl acetate:hexane)

Sources & evidence

ORD record: ord-ccdbd9e339e7451eab2c4747bb55b6b4
Source dataset: uspto-grants-1992_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05153316

Reaction notes

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