Piperidine → Ethyl 3-(3,5-di-t-butyl-4-hydroxyphenyl)-2-(3-pyridyl)propenoate

HRID 1252479

Reaktionsgleichung

Reaktionsgleichung von HRID 1252479
[C:1]([C:5]1[CH:6]=[C:7]([CH:10]=[C:11]([C:14]([CH3:17])([CH3:16])[CH3:15])[C:12]=1[OH:13])[CH:8]=O)([CH3:4])([CH3:3])[CH3:2].[N:18]1[CH:23]=[CH:22][CH:21]=[C:20]([CH2:24][C:25]([O:27][CH2:28][CH3:29])=[O:26])[CH:19]=1.N1CCCCC1>C(O)C>[C:14]([C:11]1[CH:10]=[C:7]([CH:8]=[C:24]([C:20]2[CH:19]=[N:18][CH:23]=[CH:22][CH:21]=2)[C:25]([O:27][CH2:28][CH3:29])=[O:26])[CH:6]=[C:5]([C:1]([CH3:4])([CH3:3])[CH3:2])[C:12]=1[OH:13])([CH3:17])([CH3:16])[CH3:15]

Komponenten

5

Edukt 3

HCID 8082PiperidineHCID 732193,5-Di-tert-butyl-4-hydroxybenzaldehydeHCID 96490Ethyl 3-pyridylacetate

Produkt 1

HCID 54533232Ethyl 3-(3,5-di-t-butyl-4-hydroxyphenyl)-2-(3-pyridyl)propenoateAusbeute 46,6 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 702EthanolLösungsmittel

Versuchsvorschrift

Here, 3,5-di-t-butyl-4-hydroxybenzaldehyde (223 g, 0.952 mol), Ethyl 3-pyridylacetate (157.2 g, 0.952 mol), piperidine (81 g, 0.952 mol) and p-tolunesulfonic acid (0.5 g) are combined in ethanol (2,400 ml) and heated at reflux for 48 hours. The reaction mixture is allowed to cool to room temperature and then stirred on an ice bath, whereupon the product begins to crystallize. The mixture is stored in the freezer overnight, filtered and rinsed with cold ethanol-water (1:1). The product is dried, giving ethyl 3-(3,5-di-t-butyl-4-hydroxyphenyl)-2-(3-pyridyl)propenoate (169.1 g) Mp 119.5°-120.5° C.

Aufarbeitung

  1. temperatureheated
  2. temperatureat reflux for 48 hours
  3. customto crystallize
  4. customis stored in the freezer overnight
  5. filtrationfiltered
  6. washrinsed with cold ethanol-water (1:1)
  7. customThe product is dried

Quellen und Nachweise

ORD-Eintrag
ord-10069ad1bd3e4bc2815288b9b7c98c71
Quelldatensatz
uspto-grants-1988_05
Patentnummer
US04743606

Verknüpfte Notizen

Wird geladen…