Triphenylphosphine → (Cyclopentylmethyl)triphenylphosphonium iodide

HRID 966692Notes

Reaction equation

HRID 966692 reaction equation
[I:1][CH2:2][CH:3]1[CH2:7][CH2:6][CH2:5][CH2:4]1.[C:8]1([P:14]([C:21]2[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=2)[C:15]2[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=2)[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1>C(#N)C>[I-:1].[CH:3]1([CH2:2][P+:14]([C:15]2[CH:16]=[CH:17][CH:18]=[CH:19][CH:20]=2)([C:21]2[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=2)[C:8]2[CH:9]=[CH:10][CH:11]=[CH:12][CH:13]=2)[CH2:7][CH2:6][CH2:5][CH2:4]1

Participants

4

Reactant 2

HCID 11776TriphenylphosphineHCID 2762531(Iodomethyl)cyclopentane

Product 1

HCID 22315319(Cyclopentylmethyl)triphenylphosphonium iodideYield 86.3%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Conditions

Temperature
25 °C

Procedure

A solution of iodomethylcyclopentane (4.60 g, 21.89 mmol) and triphenylphosphine (5.74 g, 21.89 mmol) in acetonitrile (22 mL) was heated under reflux for 2 weeks. The reaction mixture was allowed to cool to 25° C. and then concentrated in vacuo to provide an orange solid. The orange solid was triturated with diethyl ether and then filtered. The solid was washed well with diethyl ether until the washings showed the absence of iodomethylcyclopentane and triphenylphosphine by thin layer chromatography. The solid was allowed to air dry to afford cyclopentylmethyl triphenylphosphonium iodide (8.92 g, 86%) as a light orange solid: mp 195-198° C.; FAB-HRMS m/e calcd for C24H26P (M+H)+345.1772, found 345.1784.

Workup

  1. temperatureunder reflux for 2 weeks
  2. concentrationconcentrated in vacuo
  3. customto provide an orange solid
  4. customThe orange solid was triturated with diethyl ether
  5. filtrationfiltered
  6. washThe solid was washed well with diethyl ether until the washings
  7. customto air dry

Sources & evidence

ORD record
ord-721d9a509c1b45bc8769cfdd7039c483
Source dataset
uspto-grants-2005_10
Patent number
US06951945B2

Reaction notes

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