Ethyl 4-iodobenzoate → Ethyl 4-[(5,6,7,8-tetrahydro-8,8-dimethyl-5-oxonaphth-2-yl)ethynyl]benzoate

HRID 1226

Reaction equation

HRID 1226 reaction equation
[C:1]([C:3]1[CH:4]=[C:5]2[C:10](=[CH:11][CH:12]=1)[C:9](=[O:13])[CH2:8][CH2:7][C:6]2([CH3:15])[CH3:14])#[CH:2].I[C:17]1[CH:27]=[CH:26][C:20]([C:21]([O:23][CH2:24][CH3:25])=[O:22])=[CH:19][CH:18]=1>C(N(CC)CC)C.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[CH3:14][C:6]1([CH3:15])[C:5]2[CH:4]=[C:3]([C:1]#[C:2][C:17]3[CH:27]=[CH:26][C:20]([C:21]([O:23][CH2:24][CH3:25])=[O:22])=[CH:19][CH:18]=3)[CH:12]=[CH:11][C:10]=2[C:9](=[O:13])[CH2:8][CH2:7]1

Participants

5

Reactant 2

HCID 142891Ethyl 4-iodobenzoateHCID 225688236-ethynyl-3,4-dihydro-4,4-dimethylnaphthalen-1(2H)-one2×

Product 1

HCID 15345545Ethyl 4-[(5,6,7,8-tetrahydro-8,8-dimethyl-5-oxonaphth-2-yl)ethynyl]benzoate

Reagents, catalysts & solvents 2

HCID 178418476HCID 178418476, compoundCatalystHCID 8471TriethylamineSolvent

Procedure

To a solution of 8.8 g (47.8 mmol) of 6-ethynyl-1,2,3,4-tetrahydro-4,4-dimethylnaphthalen-1-one (Compound K) flushed for 15 minutes with a stream of argon, and 13.2 g (47.8 mmol) of ethyl 4-iodobenzoate in 200 ml of triethylamine was added 1.1 g (1.6 mmol) of bis(triphenylphosphine)palladium(II) chloride and 0.30 g (1.6 mmol) of cuprous iodide. The solution mixture was flushed with argon for 5 minutes and then stirred at ambient temperature for 18 hours. The reaction mixture was filtered through celite and the filtrate concentrated in vacuo. Purification by flash chromatography (silica, 10% EtOAc-hexane) yielded the title compound as a white solid.

Workup

  1. customThe solution mixture was flushed with argon for 5 minutes
  2. filtrationThe reaction mixture was filtered through celite
  3. concentrationthe filtrate concentrated in vacuo
  4. customPurification by flash chromatography (silica, 10% EtOAc-hexane)

Sources & evidence

ORD record
ord-445de8cff1a04382843fe36a0a03ecd1
Source dataset
uspto-grants-1998_03
Patent number
US05723620

Linked notes

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