Cyclohexanol → Cyclohexyl Hydrogen Phenylmalonate

HRID 53198

Reaction equation

HRID 53198 reaction equation
[C:1]1([CH:7]([C:11]([OH:13])=[O:12])[C:8]([OH:10])=[O:9])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.S(Cl)(Cl)=O.[CH:18]1(O)[CH2:23][CH2:22][CH2:21][CH2:20][CH2:19]1>CCOCC.CN(C)C=O>[C:1]1([CH:7]([C:11]([OH:13])=[O:12])[C:8]([O:10][CH:18]2[CH2:23][CH2:22][CH2:21][CH2:20][CH2:19]2)=[O:9])[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=1

Participants

6

Reactant 3

HCID 7966CyclohexanolHCID 24386Thionyl ChlorideHCID 75791Phenylmalonic acid

Product 1

HCID 19042990Cyclohexyl Hydrogen Phenylmalonate

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideCatalystHCID 3283Diethyl EtherSolvent

Procedure

Phenylmalonic acid (13.5 g, 0.07 mol) in dry ether (40 mL) was treated with thionyl chloride (8.92 g, 5.4 mL, 0.07 mol) and one drop of N,N-dimethylformamide. The mixture was heated at 40°-50° C. for 3 hours. The clear solution was distilled under vacuum. The oily residue was redissolved in dry ether (40 mL), the solution was treated with cyclohexyl alcohol (0.075 mol), 7.9 mL) and refluxed for 2 hours. The mixture was worked up as before to give an oily product which crystallized on standing. Recrystallization was carried out from a benzene-petroleum ether (40°-60°) mixture to give a white crystalline product.

Workup

  1. temperatureThe mixture was heated at 40°-50° C. for 3 hours
  2. distillationThe clear solution was distilled under vacuum
  3. dissolutionThe oily residue was redissolved in dry ether (40 mL)
  4. temperaturerefluxed for 2 hours
  5. customto give an oily product which
  6. customcrystallized
  7. customRecrystallization
  8. customwas carried out from a benzene-petroleum ether (40°-60°) mixture
  9. customto give a white crystalline product

Sources & evidence

ORD record
ord-4f01c620be9f4001a84e5ba6c5b4be16
Source dataset
uspto-grants-1997_04
Patent number
US05618826

Linked notes

Loading…