Hydrochloric Acid → 5-(2-Bromophenyl)-4-pentynoic acid

HRID 1073636Notes

Reaction equation

HRID 1073636 reaction equation
[C:1]([OH:7])(=[O:6])[CH2:2][CH2:3][C:4]#[CH:5].[Br:8][C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][C:10]=1I.Cl>[Cu]I.C(NCC)C>[Br:8][C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][C:10]=1[C:5]#[C:4][CH2:3][CH2:2][C:1]([OH:7])=[O:6]

Participants

6

Reactant 3

HCID 313Hydrochloric AcidHCID 114151-Bromo-2-iodobenzeneHCID 224644-Pentynoic acid

Product 1

HCID 147984675-(2-Bromophenyl)-4-pentynoic acid

Reagents, catalysts & solvents 2

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 8021DiethylamineSolvent

Procedure

To 10 ml of diethylamine was added with stirring 0.5g (5.1 mmol) of 4-pentynoic acid, 1.4g (5 mmol) of 1-bromo-2-iodobenzene, and 60 mg (0 05 mmol) of trakis(triphenylphosphine)palladium(0) The slurry was degassed with argon and 0.19 g (1.0 mmol) of CuI was added. The reaction mixture was stirred for 2 hr. at room temperature and then poured into approximately 100 ml of a 10% HCl solution. The resulting precipitate was filtered, washed with water and dried. The solid was taken up in hot CHCl3 and filtered to remove insoluble salts. After evaporation of the solvent, the resulting orange solid was recrystallized from a chloroform-hexane mixture to produce a tan solid, m.p. 87-91° C.

Workup

  1. additionwas added
  2. filtrationThe resulting precipitate was filtered
  3. washwashed with water
  4. customdried
  5. filtrationfiltered
  6. customto remove insoluble salts
  7. customAfter evaporation of the solvent
  8. customthe resulting orange solid was recrystallized from a chloroform-hexane mixture
  9. customto produce a tan solid, m.p. 87-91° C.

Sources & evidence

ORD record
ord-57a708ec762d4984b0411282b9171e54
Source dataset
uspto-grants-1990_11
Patent number
US04970234

Reaction notes

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