Iodoethane → 3-[3-(3-Ethyl-5-isopropyl-2,6-dioxo-1,2,3,6-tetrahydro-pyrimidine-4-carbonyl)-5-methyl-phenyl]-acrylonitrile

HRID 2194752Notes

Reaction equation

HRID 2194752 reaction equation
[CH:1]([C:4]1[C:9](=[O:10])[NH:8][C:7](=[O:11])[NH:6][C:5]=1[C:12]([C:14]1[CH:15]=[C:16]([CH:21]=[CH:22][C:23]#[N:24])[CH:17]=[C:18]([CH3:20])[CH:19]=1)=[O:13])([CH3:3])[CH3:2].C(=O)([O-])[O-].[K+].[K+].I[CH2:32][CH3:33]>CN(C=O)C>[CH2:32]([N:6]1[C:5]([C:12]([C:14]2[CH:15]=[C:16]([CH:21]=[CH:22][C:23]#[N:24])[CH:17]=[C:18]([CH3:20])[CH:19]=2)=[O:13])=[C:4]([CH:1]([CH3:3])[CH3:2])[C:9](=[O:10])[NH:8][C:7]1=[O:11])[CH3:33]

Participants

5

Reactant 3

HCID 6340IodoethaneHCID 11430Potassium CarbonateHCID 667053903-[3-(5-Isopropyl-2,6-dioxo-1,2,3,6-tetrahydro-pyrimidine-4-carbonyl)-5-methyl-phenyl]-acrylonitrile2×

Product 1

HCID 670505193-[3-(3-Ethyl-5-isopropyl-2,6-dioxo-1,2,3,6-tetrahydro-pyrimidine-4-carbonyl)-5-methyl-phenyl]-acrylonitrileYield 54.1%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a stirred solution of 3-[3-(5-isopropyl-2,6-dioxo-1,2,3,6-tetrahydro-pyrimidine-4-carbonyl)-5-methyl-phenyl]-acrylonitrile (Compound 55) (323 mg, 1 mmol) and anhydrous powdered potassium carbonate (165 mg, 1.2 mmol) in DMF at room temperature, was added iodoethane (97 μL, 1.2 mmol). After stirring overnight, the mixture was evaporated in vacuo and the residue was purified by silica gel column chromatography (eluent, ethyl acetate:hexane (1:2)) to give 190 mg (54%) of 3-[3-(3-ethyl-5-isopropyl-2,6-dioxo-1,2,3,6-tetrahydro-pyrimidine-4-carbonyl)-5-methyl-phenyl]-acrylonitrile (73) as a white solid. The product was recrystallized from chloroform-ether. m.p. 174-176° C.; 1H-NMR (200 MHz, CDCl3) δ 1.12-1.30 (9H, m), 2.29 (1H, m), 2.51 (3H, s), 3.25 (1H, m), 3.90 (1H, m), 6.06 (1H, d, J=16.8 Hz), 7.47 (1H, d, J=16.8 Hz), 7.64 (1H, s), 7.80 (1H, s), 7.92 (1H, s), 10.08 (1H, s); m/z (EI) 351 (M+).

Workup

  1. customthe mixture was evaporated in vacuo
  2. customthe residue was purified by silica gel column chromatography (eluent, ethyl acetate:hexane (1:2))

Sources & evidence

ORD record
ord-1676e0f4a25d4cc6a74e47db1efef7dd
Source dataset
uspto-grants-2012_12
Patent number
US08334295B2

Reaction notes

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