Triphenylphosphine → HCID 178437468, compound

HRID 858457Notes

Reaction equation

HRID 858457 reaction equation
[Cl:1][C:2]1[C:23]([Cl:24])=[CH:22][C:5]2[N:6]([C:11]3[CH:16]=[CH:15][C:14]([C@H:17]4[CH2:20][C@H:19](O)[CH2:18]4)=[CH:13][CH:12]=3)[C:7]([CH2:9][CH3:10])=[N:8][C:4]=2[CH:3]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P([N:58]=[N+:59]=[N-:60])(C2C=CC=CC=2)=O)C=CC=CC=1.N(C(OCC)=O)=NC(OCC)=O>C1COCC1.C(OCC)(=O)C>[Cl:1][C:2]1[C:23]([Cl:24])=[CH:22][C:5]2[N:6]([C:11]3[CH:16]=[CH:15][C:14]([C@@H:17]4[CH2:20][C@H:19]([N:58]=[N+:59]=[N-:60])[CH2:18]4)=[CH:13][CH:12]=3)[C:7]([CH2:9][CH3:10])=[N:8][C:4]=2[CH:3]=1

Participants

7

Reactant 4

HCID 11776TriphenylphosphineHCID 199401P,P-Diphenylphosphinic azideHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 178437469HCID 178437469, compound

Product 1

HCID 178437468HCID 178437468, compoundYield 83%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a stirred solution of trans-3-[4-(5,6-dichloro-2-ethyl-1H-benzimidazol-1-yl)phenyl]cyclobutanol (step 8, 572 mg, 1.6 mmol), triphenylphosphine (623 mg, 2.4 mmol) and diphenylphosphoryl azide (DPPA) (655 mg, 2.4 mmol) in THF (8 mL) was added diethyl azodicarboxylate (415 mg, 2.4 mmol) at room temperature. The resulting mixture was stirred at room temperature for 3 h, then the mixture was diluted with ethyl acetate (100 mL) and washed with water (100 mL) and brine (100 mL). The organic layer was dried (Na2SO4), and concentrated. Purification by flash column chromatography on silica gel eluting with hexane/ethyl acetate (2:1) to afford 506 mg (83%) of the title compound as colorless solids: MS (EI) m/z: 385 (M+); 1H-NMR (CDCl3) δ 7.84 (1H, br.s), 7.42 (2H, d, J=8.3 Hz), 7.28 (2H, d, J=8.3 Hz), 7.17 (1H, br.s), 3.98–3.88 (1H, m), 3.37–3.25 (1H, m), 2.89–2.75 (2H, m), 2.77 (2H, q, J=7.6 Hz), 2.34–2.23 (2H, m), 1.34 (3H, t, J=7.6 Hz).

Workup

  1. washwashed with water (100 mL) and brine (100 mL)
  2. dry with materialThe organic layer was dried (Na2SO4)
  3. concentrationconcentrated
  4. customPurification by flash column chromatography on silica gel eluting with hexane/ethyl acetate (2:1)

Sources & evidence

ORD record
ord-e3368712c5a84a209b46038cbf7ba5ba
Source dataset
uspto-grants-2006_12
Patent number
US07148234B2

Reaction notes

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