Potassium Carbonate → tert-butyl 4-[4-(4-fluorophenyl)-5-pyrimidin-4-yl-1H-imidazol-1-yl]piperidine-1-carboxylate

HRID 1896652Notes

Reaction equation

HRID 1896652 reaction equation
[N:1]1[CH:6]=[CH:5][C:4](/[CH:7]=[N:8]/[CH:9]2[CH2:14][CH2:13][N:12]([C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[CH2:11][CH2:10]2)=[N:3][CH:2]=1.[F:22][C:23]1[CH:28]=[CH:27][C:26]([CH:29]([N+:40]#[C-:41])S(C2C=CC(C)=CC=2)(=O)=O)=[CH:25][CH:24]=1.C(=O)([O-])[O-].[K+].[K+].COC(C)(C)C>CN(C=O)C>[F:22][C:23]1[CH:28]=[CH:27][C:26]([C:29]2[N:40]=[CH:41][N:8]([CH:9]3[CH2:10][CH2:11][N:12]([C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[CH2:13][CH2:14]3)[C:7]=2[C:4]2[CH:5]=[CH:6][N:1]=[CH:2][N:3]=2)=[CH:25][CH:24]=1

Participants

6

Reactant 4

HCID 11430Potassium CarbonateHCID 15413tert-Butyl methyl etherHCID 10827289a-Tosyl-(4-fluorobenzyl) isocyanideHCID 178452095HCID 178452095, compound

Product 1

HCID 58235130tert-butyl 4-[4-(4-fluorophenyl)-5-pyrimidin-4-yl-1H-imidazol-1-yl]piperidine-1-carboxylate

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A mixture of tert-butyl 4-{[(1E)-pyrimidin-4-ylmethylene]amino}piperidine-1-carboxylate (C13) (57.66 g, 198.6 mmol), 1-fluoro-4-{isocyano[(4-methylphenyl)sulfonyl]methyl}benzene (C2) (38.30 g, 132.4 mmol) and potassium carbonate (36.59 g, 264.8 mmol) in DMF (575 mL) was stirred for 18 hours. The reaction was filtered, and the solids were washed with ethyl acetate and discarded. The combined filtrates were diluted with ethyl acetate (1 L) and washed with water (2×1 L), and the combined aqueous layers were extracted with ethyl acetate (500 mL). Concentration of the combined organic layers in vacuo provided a solid, which was heated at reflux with tert-butyl methyl ether (400 mL), then cooled to room temperature and granulated for 1 hour. The solid was collected by filtration and washed with additional tert-butyl methyl ether; this filtrate was concentrated under reduced pressure and treated in the same way, using 75 mL of tert-butyl methyl ether, to obtain a second crop. The combined solids provided the product as a white solid. Yield: 41.70 g, 98.47 mmol, 74%. 1H NMR (400 MHz, CDCl3) δ 1.49 (s, 9H), 1.81-1.92 (m, 2H), 2.16 (br d, J=12 Hz, 2H), 2.77-2.85 (m, 2H), 4.30 (br s, 2H), 4.90 (tt, J=12.0, 3.8 Hz, 1H), 7.04 (dd, J=8.7, 8.7 Hz, 2H), 7.17 (dd, J=5.3, 1.4 Hz, 1H), 7.41 (dd, J=8.9, 5.4 Hz, 2H), 7.79 (s, 1H), 8.57 (d, J=5.4 Hz, 1H), 9.29 (d, J=1.5 Hz, 1H).

Workup

  1. filtrationThe reaction was filtered
  2. washthe solids were washed with ethyl acetate
  3. additionThe combined filtrates were diluted with ethyl acetate (1 L)
  4. washwashed with water (2×1 L)
  5. extractionthe combined aqueous layers were extracted with ethyl acetate (500 mL)
  6. customConcentration of the combined organic layers in vacuo provided a solid, which
  7. temperaturewas heated
  8. waitgranulated for 1 hour
  9. filtrationThe solid was collected by filtration
  10. washwashed with additional tert-butyl methyl ether
  11. concentrationthis filtrate was concentrated under reduced pressure
  12. additiontreated in the same way
  13. customto obtain a second crop

Sources & evidence

ORD record
ord-202e7603be5b42ef8f16a72f7b19cdda
Source dataset
uspto-grants-2013_08
Patent number
US08518944B2

Reaction notes

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