Triethylamine → 1-ethoxycarbonyloxy-6-chloro1H-benzotriazole

HRID 596227Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 596227
Cl[C:2]([O:4][CH2:5][CH3:6])=[O:3].[OH:7][N:8]1[C:12]2[CH:13]=[C:14]([Cl:17])[CH:15]=[CH:16][C:11]=2[N:10]=[N:9]1.C(N(CC)CC)C>C1C=CC=CC=1>[CH2:5]([O:4][C:2]([O:7][N:8]1[C:12]2[CH:13]=[C:14]([Cl:17])[CH:15]=[CH:16][C:11]=2[N:10]=[N:9]1)=[O:3])[CH3:6]

Komponenten

5

Edukt 3

HCID 8471TriethylamineHCID 10928Ethyl chloroformateHCID 2327116-Chloro-1-hydroxy-1H-benzotriazole

Produkt 1

HCID 132928531-ethoxycarbonyloxy-6-chloro1H-benzotriazoleAusbeute 45,7 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 241BenzeneLösungsmittel3×

Versuchsvorschrift

A solution of ethyl chloroformate (2.17 g.) in benzene (10 ml.) was dropwise added to a solution of 1-hydroxy-6-chloro-1H-benzotriazole (3.38 g.) and triethylamine (2.80 ml.) in benzene (30 ml.) under ice-cooling and stirring. Benzene (30 ml.) was further added to the mixture and the reaction temperature was slowly elevated to room temperature, and the mixture was allowed to stand overnight. Precipitated crystals were filtered off and the filtrate was concentrated. Benzene was added to the residue and an insoluble material was filtered off, after which the filtrate was concentrated to give 1-ethoxycarbonyloxy-6-chloro-1H-benzotriazole (2.2 g.), crystal. These crystals, the precipitated crystals filtered off and the insoluble material in benzene were put together, in turn washed with water, a sodium bicarbonate aqueous solution, 1N hydrochloric acid and water, and recrystallized from methanol (75 ml.) to give the object compound (3.5 g.), white needles, mp 160° to 162° C.

Aufarbeitung

  1. temperaturecooling
  2. customwas slowly elevated to room temperature
  3. customPrecipitated crystals
  4. filtrationwere filtered off
  5. concentrationthe filtrate was concentrated
  6. additionBenzene was added to the residue
  7. filtrationan insoluble material was filtered off
  8. concentrationafter which the filtrate was concentrated

Quellen und Nachweise

ORD-Eintrag
ord-dae3dd8a67704ba3b97ed42c6e992ee2
Quelldatensatz
uspto-grants-1977_03
Patentnummer
US04010178

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