Hydrazine hydrate (1:1) → 5-[(3,5-difluorophenyl)methyl]-1H-indazol-3-amine

HRID 1186580

Reaktionsgleichung

Reaktionsgleichung von HRID 1186580
[F:1][C:2]1[CH:3]=[C:4]([CH:15]=[C:16]([F:18])[CH:17]=1)[CH2:5][C:6]1[CH:7]=[CH:8][C:9](F)=[C:10]([CH:13]=1)[C:11]#[N:12].O.[NH2:20][NH2:21]>C(O)CCC.O.C(OCC)(=O)C>[F:1][C:2]1[CH:3]=[C:4]([CH:15]=[C:16]([F:18])[CH:17]=1)[CH2:5][C:6]1[CH:13]=[C:10]2[C:9](=[CH:8][CH:7]=1)[NH:21][N:20]=[C:11]2[NH2:12]

Komponenten

5

Edukt 2

HCID 24654Hydrazine hydrate (1:1)HCID 441342595-(3,5-Difluorobenzyl)-2-fluorobenzonitrile

Produkt 1

HCID 441342655-[(3,5-difluorophenyl)methyl]-1H-indazol-3-amineAusbeute 62 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 2631-ButanolLösungsmittelHCID 22728543Water ethylacetateLösungsmittel

Reaktionsbedingungen

Temperatur
120 °C

Versuchsvorschrift

A mixture of 5-(3,5-difluoro-benzyl)-2-fluoro-benzonitrile (20 g, 80.9 mmol) and hydrazine hydrate (19.6 mL, 404 mmol) in n-butanol (200 mL) was heated at 120° C. overnight. The reaction mixture was diluted with water/ethyl acetate and the organic phase washed twice with brine, dried and evaporated. Crude was triturated with diethyl ether and filtered to afford 13 gr of final product. Purification of the resulting organic phase by chromatography over silica gel (DCM/EtOH 95:5) afforded further 6.3 g of the title compound (total amount 19.2 g, 92% yield).

Aufarbeitung

  1. washthe organic phase washed twice with brine
  2. customdried
  3. customevaporated
  4. customCrude was triturated with diethyl ether
  5. filtrationfiltered

Quellen und Nachweise

ORD-Eintrag
ord-6cd50ecd44f4466fa476e01e145ce5ee
Quelldatensatz
uspto-grants-2014_03
Patentnummer
US08673893B2

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