Hydrochloric Acid → 1-Benzylpiperidine-4-acetonitrile

HRID 126861

Reaktionsgleichung

Reaktionsgleichung von HRID 126861
[C:1]([CH:3]([CH:9]1[CH2:14][CH2:13][N:12]([CH2:15][C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)[CH2:11][CH2:10]1)C(OCC)=O)#[N:2].[OH-].[Na+].Cl>>[C:16]1([CH2:15][N:12]2[CH2:13][CH2:14][CH:9]([CH2:3][C:1]#[N:2])[CH2:10][CH2:11]2)[CH:17]=[CH:18][CH:19]=[CH:20][CH:21]=1

Komponenten

4

Edukt 3

HCID 313Hydrochloric AcidHCID 14798Sodium HydroxideHCID 14989188Ethyl alpha-cyano-1-(phenylmethyl)-4-piperidineacetate

Produkt 1

HCID 5624991-Benzylpiperidine-4-acetonitrileAusbeute 82 %

Versuchsvorschrift

A mixture of 58 parts of ethyl α-cyano-1-(phenylmethyl)-4-piperidineacetate and 125 parts of sodium hydroxide solution 2 N is stirred for 3 hours at room temperature. The mixture is neutralized with concentrated hydrochloric acid while cooling and the solvent is evaporated. The residue is stirred for 4 hours at 150° C. in 180 parts of N,N-dimethylacetamide. The reaction mixture is cooled, filtered and the filtrate is evaporated. The residue is taken up in water and extracted with methylbenzene. The extract is dried, filtered and evaporated. The residue is distilled, yielding 35 parts (82%) of 1-(phenylmethyl)-4-piperidineacetonitrile; bp. 135°-140° C. at 0.2-0.3 mm. pressure.

Aufarbeitung

  1. temperaturewhile cooling
  2. customthe solvent is evaporated
  3. stirringThe residue is stirred for 4 hours at 150° C. in 180 parts of N,N-dimethylacetamide
  4. temperatureThe reaction mixture is cooled
  5. filtrationfiltered
  6. customthe filtrate is evaporated
  7. extractionextracted with methylbenzene
  8. customThe extract is dried
  9. filtrationfiltered
  10. customevaporated
  11. distillationThe residue is distilled

Quellen und Nachweise

ORD-Eintrag
ord-a6cd05033ae94af7b28d883d7f3f3e52
Quelldatensatz
uspto-grants-1981_03
Patentnummer
US04254127

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