Methyl iodide → HCID 18916432, compound

HRID 1290624Notes

Reaction equation

HRID 1290624 reaction equation
[C:1]([C:5]1[O:6][C:7]2[C:13]([N:14]3[C:19](=[O:20])[CH:18]=[C:17]([C:21]([F:24])([F:23])[F:22])[NH:16][C:15]3=[O:25])=[C:12]([F:26])[CH:11]=[C:10]([Cl:27])[C:8]=2[N:9]=1)([CH3:4])([CH3:3])[CH3:2].[C:28](=O)([O-])[O-].[K+].[K+].IC>CC(C)=O>[C:1]([C:5]1[O:6][C:7]2[C:13]([N:14]3[C:19](=[O:20])[CH:18]=[C:17]([C:21]([F:22])([F:24])[F:23])[N:16]([CH3:28])[C:15]3=[O:25])=[C:12]([F:26])[CH:11]=[C:10]([Cl:27])[C:8]=2[N:9]=1)([CH3:4])([CH3:2])[CH3:3]

Participants

5

Reactant 3

HCID 6328Methyl iodideHCID 11430Potassium CarbonateHCID 18916403HCID 18916403, compound

Product 1

HCID 18916432HCID 18916432, compoundYield 68.1%

Reagents, catalysts & solvents 1

HCID 180AcetoneSolvent

Procedure

A stirred solution of 0.85 gram (2.1 mmole) of 3-(2-t-butyl-4-chloro-6-fluorobenzoxazol-7-yl)-6-trifluoromethyl-2,4-(1H,3H)pyrimidinedione, 0.48 gram (3.5 mmole) of potassium carbonate, 0.91 gram (6.4 mmole) of iodomethane, and 35 mL of acetone was heated at 40° C. for 2 hours, then stirred at ambient temperature for 20 hours. The reaction mixture was concentrated under reduced pressure, and the concentrate was extracted with two 50 mL portions of diethyl ether. The combined extracts were dried with magnesium sulfate and filtered. The filtrate was concentrated under reduced pressure to a yellow oil, which was subjected to column chromatography on silica gel. Elution was accomplished with 8:1 hexane:ethyl acetate. The product-containing fractions were combined and concentrated under reduce pressure, yielding 0.60 gram of 3-(2-t-butyl-4-chloro-6-fluorobenzoxazol-7-yl)-1-methyl-6-trifluoromethyl-2,4-(1H,3H)pyrimidinedione, m.p. 68°-70° C. The NMR spectrum was consistent with the proposed structure.

Workup

  1. concentrationThe reaction mixture was concentrated under reduced pressure
  2. extractionthe concentrate was extracted with two 50 mL portions of diethyl ether
  3. dry with materialThe combined extracts were dried with magnesium sulfate
  4. filtrationfiltered
  5. concentrationThe filtrate was concentrated under reduced pressure to a yellow oil, which
  6. washElution
  7. concentrationconcentrated

Sources & evidence

ORD record
ord-d8f2dc4813cc4db58a05de6218948e21
Source dataset
uspto-grants-1998_05
Patent number
US05753595

Reaction notes

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