Acetonitrile → 2-((1R,4r)-4-(4-chlorophenyl)cyclohexyl)naphthalene-1,4-dione

HRID 2261877Notes

Reaction equation

[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C@H:8]2[CH2:13][CH2:12][C@H:11]([C:14](O)=O)[CH2:10][CH2:9]2)=[CH:4][CH:3]=1.C(#N)C.[C:20]1(=[O:31])[C:29]2[C:24](=[CH:25][CH:26]=[CH:27][CH:28]=2)[C:23](=[O:30])[CH:22]=C1.S(OOS([O-])(=O)=O)([O-])(=O)=O.[NH4+].[NH4+]>O.[N+]([O-])([O-])=O.[Ag+]>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([CH:8]2[CH2:9][CH2:10][CH:11]([C:14]3[C:20](=[O:31])[C:29]4[C:24]([C:23](=[O:30])[CH:22]=3)=[CH:25][CH:26]=[CH:27][CH:28]=4)[CH2:12][CH2:13]2)=[CH:6][CH:7]=1

Participants

Conditions

Temperature: 31 °C

Procedure

To a solution of silver nitrate (14.17 g, 0.0838 moles) dissolved in 200 ml water, 100 gm (0.419 moles) trans-4-(4-chlorophenyl)cyclohexane carboxylic acid and acetonitrile (500 ml) was added. The solution was heated to reflux followed by addition of 1,4-naphthoquinone (80 gm, 0.506 moles). A solution of ammonium persulfate (239 g; 1.048 moles) in water (600 ml) was added dropwise to the above solution and continued reflux for half an hour. The reaction mass was then cooled to 30-32° C. and extracted with methylene chloride. The organic layer was first washed with water, followed with 10% sodium carbonate aqueous solution, and further with water until neutral pH. The organic layer was concentrated to afford the compound of Formula II (2-[4-(4-chlorophenyl)cyclohexyl]-1,4-naphthoquinone, 149 gm).

Workup

temperatureThe solution was heated
temperatureto reflux
temperaturecontinued reflux for half an hour
extractionextracted with methylene chloride
washThe organic layer was first washed with water
concentrationThe organic layer was concentrated

Sources & evidence

ORD record: ord-d66767c3ca15487388ba6d100ffe5c4c
Source dataset: uspto-grants-2010_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07847127B2

Reaction notes

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