N-[1-(chloromethyl)-2-oxo-4-pyridyl]-2-(4-fluoro-2-methyl-phenoxy)-4-(trifluoromethyl)benzamide → Di-tert-butyl [4-[[2-(4-fluoro-2-methyl-phenoxy)-4-(trifluoromethyl)benzoyl]amino]-2-oxo-1-pyridyl]methyl phosphate

HRID 1752979Notes

Reaction equation

HRID 1752979 reaction equation
Cl[CH2:2][N:3]1[CH:8]=[CH:7][C:6]([NH:9][C:10](=[O:30])[C:11]2[CH:16]=[CH:15][C:14]([C:17]([F:20])([F:19])[F:18])=[CH:13][C:12]=2[O:21][C:22]2[CH:27]=[CH:26][C:25]([F:28])=[CH:24][C:23]=2[CH3:29])=[CH:5][C:4]1=[O:31].[C:32]([O:36][P:37]([O:44][K])([O:39][C:40]([CH3:43])([CH3:42])[CH3:41])=[O:38])([CH3:35])([CH3:34])[CH3:33]>CN(C)C=O.[I-].C([N+](CCCC)(CCCC)CCCC)CCC.C(OCC)(=O)C>[P:37]([O:44][CH2:2][N:3]1[CH:8]=[CH:7][C:6]([NH:9][C:10](=[O:30])[C:11]2[CH:16]=[CH:15][C:14]([C:17]([F:20])([F:19])[F:18])=[CH:13][C:12]=2[O:21][C:22]2[CH:27]=[CH:26][C:25]([F:28])=[CH:24][C:23]=2[CH3:29])=[CH:5][C:4]1=[O:31])([O:36][C:32]([CH3:35])([CH3:34])[CH3:33])([O:39][C:40]([CH3:42])([CH3:43])[CH3:41])=[O:38]

Participants

6

Reactant 2

HCID 118126598N-[1-(chloromethyl)-2-oxo-4-pyridyl]-2-(4-fluoro-2-methyl-phenoxy)-4-(trifluoromethyl)benzamideHCID 178454814HCID 178454814, compound

Product 1

HCID 118126612Di-tert-butyl [4-[[2-(4-fluoro-2-methyl-phenoxy)-4-(trifluoromethyl)benzoyl]amino]-2-oxo-1-pyridyl]methyl phosphateYield 45%

Reagents, catalysts & solvents 3

HCID 67553Tetrabutylammonium IodideCatalystHCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
70 °C

Procedure

The crude N-[1-(chloromethyl)-2-oxo-4-pyridyl]-2-(4-fluoro-2-methyl-phenoxy)-4-(trifluoromethyl)benzamide from the previous step was taken up in N,N-dimethylformamide (5 mL). Di-tert-butoxyphosphoryloxypotassium (496.6 mg, 2.0 mmol) and tetrabutylammonium iodide (36.94 mg, 0.10 mmol) were added and the reaction mixture was stirred at 70° C. for 4 hours. The reaction mixture was then diluted with ethyl acetate and washed with water then brine, dried with Na2SO4, filtered and evaporated to dryness. The material was purified by column chromatography (40 g silica, 50-100% EtOAc in Hexanes), fractions with the product were pooled and evaporated to give di-tert-butyl [4-[[2-(4-fluoro-2-methyl-phenoxy)-4-(trifluoromethyl)benzoyl]amino]-2-oxo-1-pyridyl]methyl phosphate (20) (280 mg, 45%) as a yellow oil that was used in the next step without further purification. ESI-MS m/z calc. 628.20, found 629 (M+1)+; Retention time: 0.76 minutes (1 minute run).

Workup

  1. washwashed with water
  2. dry with materialbrine, dried with Na2SO4
  3. filtrationfiltered
  4. customevaporated to dryness
  5. customThe material was purified by column chromatography (40 g silica, 50-100% EtOAc in Hexanes), fractions with the product
  6. customevaporated

Sources & evidence

ORD record
ord-b968d5e3e19f4fee9e6479426283a9f9
Source dataset
uspto-grants-2015_10
Patent number
US09163042B2

Reaction notes

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