Water → 4-(3-Bromophenyl)but-3-yn-1-ol

HRID 30566

Reaction equation

HRID 30566 reaction equation
I[C:2]1[CH:3]=[C:4]([Br:8])[CH:5]=[CH:6][CH:7]=1.[CH:9]#[C:10][CH2:11][CH2:12][OH:13].C(N(CC)CC)C.O>CN(C=O)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>[Br:8][C:4]1[CH:3]=[C:2]([C:9]#[C:10][CH2:11][CH2:12][OH:13])[CH:7]=[CH:6][CH:5]=1

Participants

8

Reactant 4

HCID 962WaterHCID 8471TriethylamineHCID 11561Benzene, 1-bromo-3-iodo-HCID 135663-Butyn-1-OL

Product 1

HCID 218954424-(3-Bromophenyl)but-3-yn-1-olYield 92%

Reagents, catalysts & solvents 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418476HCID 178418476, compoundCatalystHCID 6228DimethylformamideSolvent

Procedure

A solution of 10.0 gm (35.3 mmol) of 3-iodo-bromobenzene in DMF was treated with 2.95 mL (88 mmol) of 4-butyne-1-ol, 0.2 gm (1.06 mmol) of copper (I) iodide, 1.23 gm of dichlorobis(triphenylphosphine)-palladium(II), and 49 mL (0.35 mol) of triethylamine, stirred at room temperature for 18 h, poured into water and extracted with EtOAc. The combined extracts were washed sequentially with water and brine, dried over Na2SO4 and concentrated at reduced pressure. Chromatography of the resultant concentrate on silica gel with a gradient of 5% to 30% EtOAc-hexanes afforded 4-(3-bromophenyl)but-3-yn-1-ol as an orange oil, 7.3 gm (92% yield); 1H NMR (400 MHz, CDCl3) δ: 1.79 (s, 1H), 2.67 (t, 2H, J=6.3 Hz), 3.80 (t, 2H, J=6.3 Hz), 7.14 (t, 1H, J=7.9 Hz), 7.30 (d, 1H, J=7.9 Hz), 7.41 (m, 1H), 7.54 (t, 1H, J=1.6 Hz).

Workup

  1. extractionextracted with EtOAc
  2. washThe combined extracts were washed sequentially with water and brine
  3. dry with materialdried over Na2SO4
  4. concentrationconcentrated at reduced pressure
  5. concentrationChromatography of the resultant concentrate on silica gel with a gradient of 5% to 30% EtOAc-hexanes

Sources & evidence

ORD record
ord-cbe3e1baed484ad6aa1b66bc899ccbd9
Source dataset
uspto-grants-2008_09
Patent number
US07423158B2

Linked notes

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