3-Fluorophenylhydrazine hydrochloride → 7-Fluoro-N,N-dimethyl-2,3,4,9-tetrahydro-1H-carbazol-3-amine

HRID 427153

Reaction equation

HRID 427153 reaction equation
Cl.[CH3:2][N:3]([CH:5]1[CH2:10][CH2:9][CH2:8][CH2:7][C:6]1=O)[CH3:4].Cl.[F:13][C:14]1[CH:15]=[C:16]([NH:20]N)[CH:17]=[CH:18][CH:19]=1>C(O)C>[CH3:2][N:3]([CH3:4])[CH:5]1[CH2:10][C:9]2[C:17]3[C:16](=[CH:15][C:14]([F:13])=[CH:19][CH:18]=3)[NH:20][C:8]=2[CH2:7][CH2:6]1

Participants

4

Reactant 2

HCID 27239143-Fluorophenylhydrazine hydrochlorideHCID 23470418Dimethylaminocyclohexanone hydrochloride

Product 1

HCID 123618347-Fluoro-N,N-dimethyl-2,3,4,9-tetrahydro-1H-carbazol-3-amine

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

A solution of 35.5 g. of dimethylaminocyclohexanone hydrochloride and 34.5 g. of 3-fluorophenylhydrazine hydrochloride in 500 ml. of absolute ethyl alcohol was heated at reflux for twenty hours and then cooled in an ice bath. The resulting crystals were collected by filtration, suspended in chloroform, and treated with dilute potassium hydroxide. The chloroform layer was separated and evaporated to dryness under reduced pressure to give, after recrystallization from isopropyl alcohol, 31.5 g. of 3-(dimethylamino)-7-fluoro-1,2,3,4-tetrahydrocarbazole, m.p. 174°-176° C.

Workup

  1. temperatureat reflux for twenty hours
  2. temperaturecooled in an ice bath
  3. filtrationThe resulting crystals were collected by filtration
  4. additiontreated with dilute potassium hydroxide
  5. customThe chloroform layer was separated
  6. customevaporated to dryness under reduced pressure
  7. customto give
  8. customafter recrystallization from isopropyl alcohol, 31.5 g

Sources & evidence

ORD record
ord-a320191ad3864c8bbd2b038ed170ffdf
Source dataset
uspto-grants-1979_10
Patent number
US04172834

Linked notes

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