Triphenylphosphine → N-Hydroxy-N-[1-[4-[4-(4-fluorophenyl)-5-(4-pyridyl)1H-imidazol-2-yl]phenyl]ethyl]urea

HRID 1387636Notes

Reaction equation

HRID 1387636 reaction equation
[CH3:1][CH:2](O)[C:3]1[CH:8]=[CH:7][C:6]([C:9]2[NH:10][C:11]([C:21]3[CH:26]=[CH:25][N:24]=[CH:23][CH:22]=3)=[C:12]([C:14]3[CH:19]=[CH:18][C:17]([F:20])=[CH:16][CH:15]=3)[N:13]=2)=[CH:5][CH:4]=1.P(C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.C([O:54][C:55]([NH:57][O:58]C(OCC1C=CC=CC=1)=O)=O)C1C=CC=CC=1.CCOC(/[N:74]=N/C(OCC)=O)=O>C1COCC1>[OH:58][N:57]([CH:2]([C:3]1[CH:8]=[CH:7][C:6]([C:9]2[NH:10][C:11]([C:21]3[CH:22]=[CH:23][N:24]=[CH:25][CH:26]=3)=[C:12]([C:14]3[CH:15]=[CH:16][C:17]([F:20])=[CH:18][CH:19]=3)[N:13]=2)=[CH:5][CH:4]=1)[CH3:1])[C:55]([NH2:74])=[O:54]

Participants

6

Reactant 4

HCID 11776TriphenylphosphineHCID 5462977Diethyl azodicarboxylateHCID 11822737N,O-bis(benzyloxycarbonyl)hydroxylamineHCID 54533644a-Methyl-4-[4-(4-fluorophenyl)-5-(4-pyridyl)imidazol-2-yl]benzyl alcohol

Product 1

HCID 18771543N-Hydroxy-N-[1-[4-[4-(4-fluorophenyl)-5-(4-pyridyl)1H-imidazol-2-yl]phenyl]ethyl]urea

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
-78 °C

Procedure

To a mixture of a-Methyl-4-[4-(4-fluorophenyl)-5-(4-pyridyl)-imidazol-2-yl]benzyl alcohol (0.25 g, 0.70 mmol), P(Ph)3 (0.46 g, 1.75 mmol) and N,O-bis(benzyloxycarbonyl)hydroxylamine (0.48 g, 1.75 mmol) in THF (15 mL) was added DEAD (0.28 mL, 1.75 mmol) at rt. The reaction mixture was stirred at this temperature for 3 h and the solvent evaporated. The residue was partially purified by flash chromatography eluting with 1% MeOH/CHCl3. Methanol (25 mL) was added to this material and the mixture was cooled to −78° C. Ammonia was bubbled in at this temperature for 15 min. The reaction mixture was warmed slowly to rt, stoppered and stirred at rt for 2 days. The solvent was evaporated and the residue was purified by flash chromatography eluting with a solvent gradient of 1-10% MeOH/CHCl3. The title compound was obtained as an off-white solid (0.43 g, 14%): FABMS (m/z): 418 (M++H).

Workup

  1. customthe solvent evaporated
  2. customThe residue was partially purified by flash chromatography
  3. washeluting with 1% MeOH/CHCl3
  4. additionMethanol (25 mL) was added to this material
  5. customAmmonia was bubbled in at this temperature for 15 min
  6. temperatureThe reaction mixture was warmed slowly to rt
  7. stirringstirred at rt for 2 days
  8. customThe solvent was evaporated
  9. customthe residue was purified by flash chromatography
  10. washeluting with a solvent gradient of 1-10% MeOH/CHCl3

Sources & evidence

ORD record
ord-9e4d51db6fd4407d994597c91598341e
Source dataset
uspto-grants-2001_07
Patent number
US06268370B1

Reaction notes

Loading…