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

HRID 2194751Notes

Reaction equation

HRID 2194751 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-].[Li+].Br[CH2:34][CH:35]1[CH2:37][CH2:36]1>CN(C=O)C>[CH:35]1([CH2:34][N:6]2[C:5]([C:12]([C:14]3[CH:15]=[C:16]([CH:21]=[CH:22][C:23]#[N:24])[CH:17]=[C:18]([CH3:20])[CH:19]=3)=[O:13])=[C:4]([CH:1]([CH3:3])[CH3:2])[C:9](=[O:10])[NH:8][C:7]2=[O:11])[CH2:37][CH2:36]1

Participants

6

Reactant 4

HCID 11430Potassium CarbonateHCID 66321Lithium iodideHCID 81503BromomethylcyclopropaneHCID 667053903-[3-(5-Isopropyl-2,6-dioxo-1,2,3,6-tetrahydro-pyrimidine-4-carbonyl)-5-methyl-phenyl]-acrylonitrile2×

Product 1

HCID 670504973-[3-(3-Cyclopropylmethyl-5-isopropyl-2,6-dioxo-1,2,3,6-tetrahydro-pyrimidine-4-carbonyl)-5-methyl-phenyl]-acrylonitrileYield 84.8%

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), anhydrous powdered potassium carbonate (165 mg, 1.2 mmol), and lithium iodide (134 mg, 1 mmol) in DMF (5 mL) at room temperature, was added bromomethyl cyclopropane (97 μL, 1 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 320 mg (84%) of 3-[3-(3-cyclopropylmethyl-5-isopropyl-2,6-dioxo-1,2,3,6-tetrahydro-pyrimidine-4-carbonyl)-5-methyl-phenyl]-acrylonitrile (72) as a white solid. The product was recrystallized from chloroform-ether to afford a white solid. m.p. 225-226° C.; 1H-NMR (300 MHz, CDCl3) δ 0.22-0.44 (4H, m), 0.93 (1H, m), 1.12 (3H, d, J=6.9 Hz), 1.24 (3H, d, J=6.9 Hz), 2.28 (1H, m), 2.50 (3H, s), 3.28 (1H, dd, J=6.0 Hz, J=15.0 Hz), 3.59 (1H, dd, J=6.0 Hz, J=15.0 Hz), 6.01 (1H, d, J=16.8 Hz), 7.44 (1H, d, J=16.8 Hz), 7.61 (1H, s), 7.77 (1H, s), 7.88 (1H, s), 9.00 (1H, s); m/z (EI) 377 (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-7378fb4c6a8b4fc0bbc9cea9480515c3
Source dataset
uspto-grants-2012_12
Patent number
US08334295B2

Reaction notes

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