Chlorobenzene → 4-Phenylpiperidine

HRID 1884179Notes

Reaction equation

HRID 1884179 reaction equation
Cl[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[NH:8]1[CH2:13][CH2:12][CH2:11][CH2:10][CH2:9]1.CC([O-])(C)C.[Na+]>COCCOC.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd]>[C:2]1([CH:11]2[CH2:12][CH2:13][NH:8][CH2:9][CH2:10]2)[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

6

Reactant 3

HCID 7964ChlorobenzeneHCID 8082PiperidineHCID 23676156Sodium t-butoxide

Product 1

HCID 698734-PhenylpiperidineYield 11%

Reagents, catalysts & solvents 2

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 80711,2-DimethoxyethaneSolvent

Procedure

The general procedure from Example 1A was followed using chlorobenzene (135 mg, 1.2 mmol) and piperidine (86 mg, 1.0 mmol) with Pd2(dba)3 (20 mg, 0.0218 mmol) and (Me2CH)PH(O)(Ph) from Experiment 1, (7.1 mg, 0.0424 mmol) and NaOtBu (144 mg, 1.5 mmol) in 2.0 mL of 1,2-dimethoxyethane. After 5 h, the reaction mixture was chromatographed with 5% ethyl acetate/hexane to give 17 mg (11% yield) of 4-phenylpiperidine. It was >95% pure by 1H NMR and GC/MS. 1H NMR (500 MHz, CDCl3): δ7.15 (m, 2H), 6.84 (m, 2H), 6.72 (m, 1H), 3.06 (t, J=5.48 Hz, 4H), 1.61 (m, 4H), 1.48 (m, 2H) ppm. 13C NMR (125 MHz, CDCl3): δ152.3, 129.0, 119.2, 116.5, 50.7, 25.9,24.4 3 ppm. MS: Calculated for C11H15N(M+): 161.3. Found: 162.3 (M++H).

Workup

  1. customthe reaction mixture was chromatographed with 5% ethyl acetate/hexane

Sources & evidence

ORD record
ord-930a86abe4774571be5e931fadec742e
Source dataset
uspto-grants-2004_07
Patent number
US06762330B2

Reaction notes

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