Ethylene Glycol → 3,3-Ethylenedioxy-1-phenylcyclohexanecarbonitrile

HRID 11214Notes

Reaction equation

HRID 11214 reaction equation
[O:1]=[C:2]1[CH2:7][CH2:6][CH2:5][C:4]([C:10]2[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=2)([C:8]#[N:9])[CH2:3]1.[CH2:16](O)[CH2:17][OH:18].C1(C)C=CC(S([O-])(=O)=O)=CC=1.[NH+]1C=CC=CC=1>C1C=CC=CC=1>[CH2:16]1[CH2:17][O:18][C:2]2([CH2:7][CH2:6][CH2:5][C:4]([C:10]3[CH:11]=[CH:12][CH:13]=[CH:14][CH:15]=3)([C:8]#[N:9])[CH2:3]2)[O:1]1

Participants

5

Reactant 3

HCID 174Ethylene GlycolHCID 466102Benzenesulfonic acid, 4-methyl-, compd. with pyridine (1:1)HCID 123391223-Oxo-1-phenylcyclohexanecarbonitrile

Product 1

HCID 123391803,3-Ethylenedioxy-1-phenylcyclohexanecarbonitrileYield 48%

Reagents, catalysts & solvents 1

HCID 241BenzeneSolvent

Conditions

Temperature
111 °C

Procedure

The mixture of 3-oxo-1-phenylcyclohexanecarbonitrile (2.62 g), ethylene glycol (3.65 mL) and pyridinium p-toluene sulfonate (1 spatula) in benzene (40 mL) was stirred at 111° C. with Dean-Stark apparatus overnight. After cooling down to room temperature, the mixture was washed with saturated sodium bicarbonate and the organic layer was separated. The aqueous layer was extracted with dichloromethane 3 times and the combined organic layers were dried over magnesium sulfate, filtered and concentrated under vacuum. The crude material was purified by Flash Chromatography with from 25% ethyl acetate/75% hexane to 30% ethyl acetate/70% hexane over 20 minutes. The title compound was obtained as a white solid (1.66 g, 48% yield in 2 steps). 1H NMR (400 MHz, CDCl3) δ 1.56 (1H, dt, J=4, 16 Hz), 1.70–1.79 (1H, m), 1.89–1.96 (3H, m), 2.06–2.28 (3H, m), 3.89–3.97 (2H, m), 4.03–4.12 (2H, m), 7.28–7.32 (1H, m), 7.36–7.39 (2H, m), 7.48–7.51 (2H, m). HPLC purity (retention time): 95% (1.62 min, method C). MS: 266.37 (M+Na+).

Workup

  1. temperatureAfter cooling down to room temperature
  2. washthe mixture was washed with saturated sodium bicarbonate
  3. customthe organic layer was separated
  4. extractionThe aqueous layer was extracted with dichloromethane 3 times
  5. dry with materialthe combined organic layers were dried over magnesium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated under vacuum
  8. customThe crude material was purified by Flash Chromatography with from 25% ethyl acetate/75% hexane to 30% ethyl acetate/70% hexane over 20 minutes

Sources & evidence

ORD record
ord-41317c7bf9bf4f5cb8d294b70d2cc084
Source dataset
uspto-grants-2006_08
Patent number
US07098203B2

Reaction notes

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