Sulfuric Acid → Phenol, 2-(2H-benzotriazol-2-yl)-4-(1,1-dimethylethyl)-

HRID 1763177

Reaktionsgleichung

Reaktionsgleichung von HRID 1763177
O=C[C@@H]([C@H]([C@@H]([C@@H](CO)O)O)O)O.[OH:13][C:14]1[CH:19]=[CH:18][C:17]([C:20]([CH3:23])([CH3:22])[CH3:21])=[CH:16][C:15]=1[N:24]1[N+:28]([O-])=[C:27]2[CH:30]=[CH:31][CH:32]=[CH:33][C:26]2=[N:25]1.C1C2C(=O)C3C(=CC=CC=3)CC=2C=CC=1.S(=O)(=O)(O)O>C1C2C(=O)C3C(=CC=CC=3)C=2C=CC=1>[OH:13][C:14]1[CH:19]=[CH:18][C:17]([C:20]([CH3:23])([CH3:22])[CH3:21])=[CH:16][C:15]=1[N:24]1[N:28]=[C:27]2[CH:30]=[CH:31][CH:32]=[CH:33][C:26]2=[N:25]1

Komponenten

6

Edukt 4

HCID 1118Sulfuric AcidHCID 7018AnthroneHCID 107526(2R,3S,4R,5R)-2,3,4,5,6-pentahydroxyhexanalHCID 139071722-(2-hydroxy-5-t-butylphenyl)benzotriazole-N-oxide

Produkt 1

HCID 76605Phenol, 2-(2H-benzotriazol-2-yl)-4-(1,1-dimethylethyl)-

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 10241FluorenoneKatalysator

Versuchsvorschrift

9-fluorenone 0.7 g was then added to the reaction liquor thus obtained, and the liquor was heated to 55°~60° C. Thereafter, glucose 6.0 g was added to the reaction liquor over 30 minutes, and the reaction was conducted at 75° C. (boiling point) for 6 hours. As this result, the N-oxide disappeared, thus Process (c) being completed. Thereafter, pH of the reaction liquor was made to 8 with 62% sulfuric acid 19.0 g to precipitate a crystal. The precipitated crystal was separated by filtration, and the separated crystal was fully washed with water and further with methanol. The washed crystal was then dried, thus obtaining 11.6 g of 2-(2'-hydroxy-5'-t-butylphenyl)benzotriazole.

Aufarbeitung

  1. customthus obtained
  2. temperaturethe liquor was heated to 55°~60° C
  3. customto precipitate a crystal
  4. customThe precipitated crystal was separated by filtration
  5. washthe separated crystal was fully washed with water and further with methanol
  6. customThe washed crystal was then dried

Quellen und Nachweise

ORD-Eintrag
ord-3effd731557643d5ad8e4a40f09dab5c
Quelldatensatz
uspto-grants-1989_05
Patentnummer
US04835284

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