Acetone → HCID 58054480, compound

HRID 1892897Notes

Reaction equation

HRID 1892897 reaction equation
F[C:2]1[C:9]([F:10])=[CH:8][CH:7]=[C:6]([O:11][CH3:12])[C:3]=1[C:4]#[N:5].[OH2:13].[NH2:14][NH2:15].CC(C)=O.[C:20]1(=O)O[C:23](=[O:24])[C:22]2=[CH:26][CH:27]=[CH:28][CH:29]=[C:21]12>CN1CCCC1=O.O1CCOCC1>[F:10][C:9]1[CH:8]=[CH:7][C:6]([O:11][CH3:12])=[C:3]2[C:2]=1[NH:15][N:14]=[C:4]2[N:5]1[C:20](=[O:13])[C:21]2[C:22](=[CH:26][CH:27]=[CH:28][CH:29]=2)[C:23]1=[O:24]

Participants

7

Reactant 4

HCID 180AcetoneHCID 6811Phthalic AnhydrideHCID 24654Hydrazine hydrate (1:1)HCID 38419402,3-Difluoro-6-methoxybenzonitrile

Product 1

HCID 58054480HCID 58054480, compoundYield 47%

Reagents, catalysts & solvents 2

HCID 13387N-methyl-2-pyrrolidoneSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
150 °C

Procedure

2,3-Difluoro-6-methoxybenzonitrile (600 mg, 3.5 mmol) (available from JRD Fluorochemicals) was dissolved in dry N-methylpyrrolidinone (3 mL). and then treated with hydrazine hydrate (4 equiv., 0.65 mL) (available from Aldrich) and the resulting mixture was heated in a Biotage microwave vial at high absorption level for 15 minutes at 150° C. Acetone (3 mL) was added, and the solution stirred for 15 minutes and left to stand overnight. The solution was then loaded onto a 50 g SCX-2 cartridge. The column was eluted with methanol, and then 2M ammonia solution in ethanol. The basic fractions were combined and evaporated under reduced pressure. The crude oil obtained was treated with phthalic anhydride (789 mg, 5.3 mmol) (available from Aldrich) and dry 1,4-dioxane (10 mL). The reaction mixture was stirred for 48 hours at 110° C. The dioxane was removed under reduced pressure, and the residue was partitioned between dichloromethane (50 mL) and water (50 mL). The organic phase was separated and the aqueous was further extracted with 50 mL of dichloromethane. The combined organic solutions were dried through an hydrophobic frit, and concentrated under reduced pressure. The residue was purified by chromatography on silica (100 g cartridge) on Flashmaster eluting with a gradient of 0-100% ethyl acetate in cyclohexane over 80 minutes to give the title compound (510 mg, 47%). LCMS (System A) RT=0.98 min, ES+ve m/z 312 (M+H)+.

Workup

  1. waitleft
  2. waitto stand overnight
  3. washThe column was eluted with methanol
  4. customevaporated under reduced pressure
  5. customThe crude oil obtained
  6. stirringThe reaction mixture was stirred for 48 hours at 110° C
  7. customThe dioxane was removed under reduced pressure
  8. customthe residue was partitioned between dichloromethane (50 mL) and water (50 mL)
  9. customThe organic phase was separated
  10. extractionthe aqueous was further extracted with 50 mL of dichloromethane
  11. customThe combined organic solutions were dried through an hydrophobic frit
  12. concentrationconcentrated under reduced pressure
  13. customThe residue was purified by chromatography on silica (100 g cartridge) on Flashmaster
  14. washeluting with a gradient of 0-100% ethyl acetate in cyclohexane over 80 minutes

Sources & evidence

ORD record
ord-a0b19fa6d9c4454a80e4073699212fb3
Source dataset
uspto-grants-2013_08
Patent number
US08507543B2

Reaction notes

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