Methyl iodide → 3-(5-chloro-3,4-dihydro-7-fluoro-2H-1-benzopyran-8-yl)-1-methyl-6-trifluoromethyluracil

HRID 440691Notes

Reaction equation

HRID 440691 reaction equation
[Cl:1][C:2]1[C:7]2[CH2:8][CH2:9][CH2:10][O:11][C:6]=2[C:5]([N:12]2[C:17](=[O:18])[CH:16]=[C:15]([C:19]([F:22])([F:21])[F:20])[NH:14][C:13]2=[O:23])=[C:4]([F:24])[CH:3]=1.[C:25](=O)([O-])[O-].[K+].[K+].CI.C(OCC)(=O)C>CN(C)C=O.CCCCCC>[Cl:1][C:2]1[C:7]2[CH2:8][CH2:9][CH2:10][O:11][C:6]=2[C:5]([N:12]2[C:17](=[O:18])[CH:16]=[C:15]([C:19]([F:22])([F:20])[F:21])[N:14]([CH3:25])[C:13]2=[O:23])=[C:4]([F:24])[CH:3]=1

Participants

7

Reactant 4

HCID 6328Methyl iodideHCID 8857Ethyl AcetateHCID 11430Potassium CarbonateHCID 224048003-(5-chloro-3,4-dihydro-7-fluoro-2H-1-benzopyran-8-yl)-6-trifluoromethyluracil

Product 1

HCID 224047533-(5-chloro-3,4-dihydro-7-fluoro-2H-1-benzopyran-8-yl)-1-methyl-6-trifluoromethyluracilYield 92.4%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8058HexaneSolvent

Procedure

By a method analogous to that of Example 1, Step G, 2.9 grams (0.008 mole) of 3-(5-chloro-3,4-dihydro-7-fluoro-2H-1-benzopyran-8-yl)-6-trifluoromethyluracil was reacted with 2.2 grams (0.016 mole) of potassium carbonate and 1.7 grams (0.012 mole) of methyl iodide in 50 mL of N,N-dimethylformamide. The crude reaction product was subjected to column chromatography on silica gel, with 1:9 to 1:4 ethyl acetate:hexane as eluants. The product-containing fractions were combined and concentrated under reduced pressure, yielding 2.8 grams of 3-(5-chloro-3,4-dihydro-7-fluoro-2H-1-benzopyran-8-yl)-1-methyl-6-trifluoromethyluracil, mp 141°-145° C. The NMR spectrum was consistent with the proposed structure.

Workup

  1. customThe crude reaction product
  2. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-1aebac339804434897813074cb824fc4
Source dataset
uspto-grants-1996_05
Patent number
US05521147

Reaction notes

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