Sodium borohydride → HCID 14990561, Verbindung

HRID 2166032Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2166032
[F:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]([C:10]2[CH:21]=[CH:20][C:13]3[N:14]([CH:17]([CH3:19])[CH3:18])[N:15]=[N:16][C:12]=3[CH:11]=2)=[O:9])=[CH:4][CH:3]=1.[BH4-].[Na+]>C(O)C>[F:1][C:2]1[CH:3]=[CH:4][C:5]([CH:8]([C:10]2[CH:21]=[CH:20][C:13]3[N:14]([CH:17]([CH3:18])[CH3:19])[N:15]=[N:16][C:12]=3[CH:11]=2)[OH:9])=[CH:6][CH:7]=1

Komponenten

4

Edukt 2

HCID 4311764Sodium borohydrideHCID 14990560HCID 14990560, Verbindung

Produkt 1

HCID 14990561HCID 14990561, VerbindungAusbeute 62,5 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 702EthanolLösungsmittel

Versuchsvorschrift

To a stirred solution of 17 parts of (4-fluorophenyl) [1-(1-methylethyl)-1H-benzotriazol-5-yl]methanone in 80 parts of ethanol were added 3.4 parts of sodium tetrahydroborate. After stirring for 1 hour at room temperature, the reaction mixture was neutralized to pH 7. The reaction mixture was concentrated and the product was extracted with ethyl acetate. The extract was dried, filtered and evaporated. The residue was purified by column chromatography over silica gel using a mixture of dichloromethane and methanol (98:2 by volume) as eluent. The pure fractions were collected and the eluent was evaporated, yielding 10.7 parts (62.5%) of α-(4-fluorophenyl)-1-(1-methylethyl)-1H-benzotriazole-5-methanol as a residue (int. 4).

Aufarbeitung

  1. concentrationThe reaction mixture was concentrated
  2. extractionthe product was extracted with ethyl acetate
  3. customThe extract was dried
  4. filtrationfiltered
  5. customevaporated
  6. customThe residue was purified by column chromatography over silica gel using
  7. additiona mixture of dichloromethane and methanol (98:2 by volume) as eluent
  8. customThe pure fractions were collected
  9. customthe eluent was evaporated

Quellen und Nachweise

ORD-Eintrag
ord-488be89842b74e2db449cbbae8f9921f
Quelldatensatz
uspto-grants-1990_07
Patentnummer
US04943574

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