Ethyl Acetoacetate → 3-Allyl-6-methyluracil

HRID 349288

Reaction equation

HRID 349288 reaction equation
[CH2:1]([NH:4][C:5]([NH2:7])=[O:6])[CH:2]=[CH2:3].[C:8](OCC)(=[O:13])[CH2:9][C:10]([CH3:12])=O.[OH-].[K+]>C(O)C.Cl.CO>[CH2:1]([N:4]1[C:8](=[O:13])[CH:9]=[C:10]([CH3:12])[NH:7][C:5]1=[O:6])[CH:2]=[CH2:3]

Participants

7

Reactant 3

HCID 8868Ethyl AcetoacetateHCID 11181AllylureaHCID 14797Potassium Hydroxide

Product 1

HCID 136020473-Allyl-6-methyluracil

Reagents, catalysts & solvents 3

HCID 313Hydrochloric AcidCatalystHCID 702EthanolSolventHCID 887MethanolSolvent

Procedure

To allylurea (25 g, 0.25 mol) in ethanol (10 mL) was added ethyl acetoacetate (31.86 mL, 0.25 mol) and 10 drops conc. HCl. After 12 days at room temperature, concentration gave an oil which was dissolved in MeOH. KOH (22.5 g, 0.34 mol) was added and the solution refluxed for 1 hour. After neutralization, the resulting solid 1 was collected. Yield 2.7 g (7%). NMR (CDCl3) δ: 2.16 (3H, s), 4.52 (2H, d), 5.18 (1H, d), 5.23 (1H, d), 5.60 (1H, s), 5.82–5.93 (1H, m), 10.3 (1H, s).

Workup

  1. concentrationconcentration
  2. customgave an oil which
  3. temperaturethe solution refluxed for 1 hour
  4. customAfter neutralization, the resulting solid 1 was collected

Sources & evidence

ORD record
ord-07db849e044840039386e1356153d402
Source dataset
uspto-grants-2007_02
Patent number
US07179815B2

Linked notes

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