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

HRID 841564Notes

Reaction equation

HRID 841564 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].[O:16]1[CH2:20][CH2:19][CH2:18][CH2:17]1>C(N(CC)CC)C.C(OCC)C.[Cu]I.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>[CH2:9]([O:13][C:20](=[O:16])[C:19]1[CH:3]=[CH:1][C:2]([C:2]#[C:1][C:3]2[CH:12]=[CH:11][C:10]3[C:9](=[O:13])[CH2:8][CH2:7][C:6]([CH3:15])([CH3:14])[C:5]=3[CH:4]=2)=[CH:17][CH:18]=1)[CH3:8]

Participants

7

Reactant 2

HCID 8028TetrahydrofuranHCID 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]benzoateYield 72%

Reagents, catalysts & solvents 4

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418476HCID 178418476, compoundCatalystHCID 3283Diethyl EtherSolventHCID 8471TriethylamineSolvent

Procedure

A solution of 6-ethynyl-4,4-dimethyl-1,2,3,4-tetrahydronaphthalene-1-one (Intermediate 13, 0.23 g, 1.1 mmol) and ethyl-4-iodo benzoate (Reagent A, 0.36 g, 1.3 mmol) in triethyl amine (7 mL) and anhydrous tetrahydrofuran (3 mL) was treated with copper(I)iodide (0.114 g, 0.6 mmol) and sparged with argon for 5 minutes. Dichlorobis(triphenylphosphine)palladium(II) (0.23 g, 0.33 mmol) was added and the reaction mixture was stirred overnight at room temperature. It was diluted with diethyl ether and filtered over a bed of celite. The filtrate was evaporated in vacuo to a brown oil that was subjected to flash column chromatography over silica gel (230-400 mesh) using 6-7% ethyl acetate in hexane as the eluent to afford the title compound (0.29 g, 72%) as a pale brown solid.

Workup

  1. customsparged with argon for 5 minutes
  2. filtrationfiltered over a bed of celite
  3. customThe filtrate was evaporated in vacuo to a brown oil that

Sources & evidence

ORD record
ord-c000d157dcf748dd8ffdb2776373f767
Source dataset
uspto-grants-2002_04
Patent number
US06369261B1

Reaction notes

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