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

HRID 1073636Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1073636
[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]

Komponenten

6

Edukt 3

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

Produkt 1

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

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)KatalysatorHCID 8021DiethylamineLösungsmittel

Versuchsvorschrift

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.

Aufarbeitung

  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.

Quellen und Nachweise

ORD-Eintrag
ord-57a708ec762d4984b0411282b9171e54
Quelldatensatz
uspto-grants-1990_11
Patentnummer
US04970234

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