Propargyl alcohol → 3-(4-Tert-butylphenyl)prop-2-yn-1-ol

HRID 549858Notes

Reaction equation

HRID 549858 reaction equation
Br[C:2]1[CH:7]=[CH:6][C:5]([C:8]([CH3:11])([CH3:10])[CH3:9])=[CH:4][CH:3]=1.N12CCCN=C1CCCCC2.[CH2:23]([OH:26])[C:24]#[CH:25]>O1CCCC1.CCOCC.[Cu]I.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[C:8]([C:5]1[CH:6]=[CH:7][C:2]([C:25]#[C:24][CH2:23][OH:26])=[CH:3][CH:4]=1)([CH3:11])([CH3:10])[CH3:9]

Participants

8

Reactant 3

HCID 7859Propargyl alcoholHCID 775951-Bromo-4-tert-butylbenzeneHCID 811841,8-Diazabicyclo(5.4.0)undec-7-ene

Product 1

HCID 154784403-(4-Tert-butylphenyl)prop-2-yn-1-ol

Reagents, catalysts & solvents 4

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418397HCID 178418397, compoundCatalystHCID 3283Diethyl EtherSolventHCID 8028TetrahydrofuranSolvent2×

Conditions

Temperature
50 °C

Procedure

To a degassed solution of 1-bromo-4-tert-butylbenzene (5 g, 23.5 mmol) in tetrahydrofuran (25 mL) was added in the following order: copper(I) iodide (134 mg, 0.704 mmol), tetrakis(triphenylphosphine)palladium (813 mg, 0.704 mmol), and 1,8-diazabicyclo[5.4.0]-undec-7-ene (4.2 mL, 28.1 mmol). The resulting mixture was degassed again and a solution of propargyl alcohol (1.64 mL, 28.2 mmol) in tetrahydrofuran (2 mL) was added over period of 10 min. The reaction mixture was slowly heated up to 50° C. and then stirred at this temperature over night. The mixture was diluted with ether (50 mL), washed with water (20 mL), 15% hydrochloric acid (2×20 mL) and saturated aqueous solution of sodium hydrogen carbonate (25 mL). The organic solution was dried with anhydrous magnesium sulfate and evaporated in vacuo. The residue was purified by column chromatography (silica gel Fluka 60, hexanes/ethyl acetate 5:1) affording 3-(4-tert-butylphenyl)prop-2-yn-1-ol.

Workup

  1. customThe resulting mixture was degassed again
  2. washwashed with water (20 mL), 15% hydrochloric acid (2×20 mL) and saturated aqueous solution of sodium hydrogen carbonate (25 mL)
  3. dry with materialThe organic solution was dried with anhydrous magnesium sulfate
  4. customevaporated in vacuo
  5. customThe residue was purified by column chromatography (silica gel Fluka 60, hexanes/ethyl acetate 5:1)

Sources & evidence

ORD record
ord-d0ce27af023d4e4f86e0264d6d926622
Source dataset
uspto-grants-2011_05
Patent number
US07943613B2

Reaction notes

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