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Triphenylphosphine → 2(S)-Azido4-(5-chloro-2-pyridyl)-3(S)-phenylbutane

HRID 30377
Notes
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Reaction equation

HRID 30377 reaction equation
[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([CH2:8][C@@H:9]([C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=2)[C@H:10](O)[CH3:11])=[N:6][CH:7]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P([N:52]=[N+:53]=[N-:54])(C2C=CC=CC=2)=O)C=CC=CC=1.CCOC(/N=N/C(OCC)=O)=O>C1COCC1>[N:52]([C@H:10]([C@H:9]([C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1)[CH2:8][C:5]1[CH:4]=[CH:3][C:2]([Cl:1])=[CH:7][N:6]=1)[CH3:11])=[N+:53]=[N-:54]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 4

HCID 11776TriphenylphosphineHCID 199401P,P-Diphenylphosphinic azideHCID 5462977Diethyl azodicarboxylateHCID 234047044-(5-Chloro-2-pyridyl)-3(S)-phenyl-2(R)-butanol

Product 1

HCID 234047032(S)-Azido4-(5-chloro-2-pyridyl)-3(S)-phenylbutane

Reagents, catalysts & solvents 1

HCID 8028
Tetrahydrofuran
Solvent

Procedure

To a mixture of 4-(5-chloro-2-pyridyl)-3-phenyl-2-butanol (Step B, 0.24 g, 0.92 mmol), triphenylphosphine (1.5 g, 1.4 mmol) and diphenylphosphoryl azide (0.30 mL, 1.4 mmol) in 5 mL anhydrous THF was added diethylazodicarboxylate (0.24 mL, 1.4 mmol). After stirring at room temperature overnight, the resulting mixture was concentrated with silica gel (10 g) and the residue was loaded onto a silica gel column. Elution with 5 to 15% EtOAc in hexane afforded the title compound. 1H NMR (500 MHz, CD3OD): δ 8.35 (d, 1H), 7.52 (dd, 1H), 7.25-7.05 (m, 5H), 6.95 (d, 1H), 3.81 (m, 1H), 3.48 (m, 1H), 3.15-3.05 (m, 2H), 1.14 (d, 3H).

Workup

  1. concentrationthe resulting mixture was concentrated with silica gel (10 g)
  2. washElution with 5 to 15% EtOAc in hexane

Sources & evidence

ORD record
ord-a9129ab0e7cb4bbeb260349811a2750c
Source dataset
uspto-grants-2008_09
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07423067B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes