Triphenylphosphine → 1-(t-butoxycarbonyl)-4-(1-(4-fluoro-benzyl)-1H-benzoimidazole-2-carbonyl)-piperidine

HRID 609775Notes

Reaction equation

HRID 609775 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([C:14]([C:16]2[NH:20][C:19]3[CH:21]=[CH:22][CH:23]=[CH:24][C:18]=3[N:17]=2)=[O:15])[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[F:25][C:26]1[CH:33]=[CH:32][C:29]([CH2:30]O)=[CH:28][CH:27]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.CCOC(/N=N/C(OCC)=O)=O>O1CCCC1.C(OCC)(=O)C.CCCCCC>[C:1]([O:5][C:6]([N:8]1[CH2:9][CH2:10][CH:11]([C:14]([C:16]2[N:17]([CH2:30][C:29]3[CH:32]=[CH:33][C:26]([F:25])=[CH:27][CH:28]=3)[C:18]3[CH:24]=[CH:23][CH:22]=[CH:21][C:19]=3[N:20]=2)=[O:15])[CH2:12][CH2:13]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

7

Reactant 4

HCID 11776TriphenylphosphineHCID 680224-Fluorobenzylic alcoholHCID 5462977Diethyl azodicarboxylateHCID 183332351-(t-butoxycarbonyl)-4-(1H-benzimidazole-2-carbonyl)piperidine

Product 1

HCID 183333391-(t-butoxycarbonyl)-4-(1-(4-fluoro-benzyl)-1H-benzoimidazole-2-carbonyl)-piperidine

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 21226206Ethyl acetate hexaneSolvent

Procedure

Combine 1-(t-butoxycarbonyl)-4-(1H-benzoimidazole-2-carbonyl)-piperidine (1.50 g, 4.57 mmol), 4-fluorobenzyl alcohol (0.50 mL, 4.58 mmol) and triphenylphosphine (1.44 g, 5.50 mmol) in tetrahydrofuran (15 mL). Add diethylazodicarboxylate (0.87 mL, 5.50 mmol) dropwise at room temperature. After 23 hours, evaporate the reaction mixture in vacuo to give a residue. Chromatograph the residue on silica gel eluting with 25% ethyl acetate/hexane to give 1-(t-butoxycarbonyl)-4-(1-(4-fluoro-benzyl)-1H-benzoimidazole-2-carbonyl)-piperidine.

Workup

  1. customdropwise at room temperature
  2. customevaporate the reaction mixture in vacuo
  3. customto give a residue

Sources & evidence

ORD record
ord-26501398835c43819b860206683770fe
Source dataset
uspto-grants-1999_12
Patent number
US05998439

Reaction notes

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