N-Methylpiperidine → N-(t-butoxycarbonyl)-L-valine 4-methoxy-1-phenylethylamide

HRID 248323

Reaktionsgleichung

Reaktionsgleichung von HRID 248323
CN1CCCCC1.[C:8]([O:12][C:13]([NH:15][C@H:16]([C:20]([OH:22])=O)[CH:17]([CH3:19])[CH3:18])=[O:14])([CH3:11])([CH3:10])[CH3:9].ClC(OCC(C)C)=O.[CH3:31][O:32][C:33]1[CH:38]=[CH:37][C:36]([CH:39]([NH2:41])[CH3:40])=[CH:35][CH:34]=1>C(Cl)Cl>[CH3:31][O:32][C:33]1[CH:38]=[CH:37][C:36]([CH:39]([NH:41][C:20](=[O:22])[C@H:16]([CH:17]([CH3:18])[CH3:19])[NH:15][C:13]([O:12][C:8]([CH3:9])([CH3:10])[CH3:11])=[O:14])[CH3:40])=[CH:35][CH:34]=1

Komponenten

6

Edukt 4

HCID 12291N-MethylpiperidineHCID 62365Isobutyl chloroformateHCID 83693Boc-L-ValineHCID 2381811-(4-Methoxyphenyl)ethanamine

Produkt 1

HCID 14774435N-(t-butoxycarbonyl)-L-valine 4-methoxy-1-phenylethylamideAusbeute 217,1 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Reaktionsbedingungen

Temperatur
-60 °C

Versuchsvorschrift

2.3 g (0.023 mol) of N-methylpiperidine are added to 5.0 g of t-butoxycarbonyl-L-valine (0.023 mol), dissolved in 50 ml of CH2Cl2, at -20° C. 3.2 g (0.023 mol) of isobutyl chloroformate are then rapidly added dropwise at -20° C., the mixture is subsequently stirred at the same temperature for 10 minutes and cooled to -60° C. and 3.5 g (0.023 mol) of 4-methoxy-1-phenylethylamine are allowed to run in, the temperature being kept below -15° C. After 2 hours at -15° C., the mixture is subsequently stirred at room temperature for 15 hours, the solid is filtered off and rinsed with CH2Cl2, the filtrate is concentrated, the residue is introduced into water, the mixture is extracted twice with ethyl acetate and the combined ethyl acetate phases are washed with NaHCO3 solution and water, dried and concentrated. 17.5 g (85% of theory) of N-(t-butoxycarbonyl)-L-valine 4-methoxy-1-phenylethylamide of melting point 126°-127° C. are obtained.

Aufarbeitung

  1. custombeing kept below -15° C
  2. waitAfter 2 hours at -15° C.
  3. stirringthe mixture is subsequently stirred at room temperature for 15 hours
  4. filtrationthe solid is filtered off
  5. washrinsed with CH2Cl2
  6. concentrationthe filtrate is concentrated
  7. additionthe residue is introduced into water
  8. extractionthe mixture is extracted twice with ethyl acetate
  9. washthe combined ethyl acetate phases are washed with NaHCO3 solution and water
  10. customdried
  11. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-82146073056f4aa1ba339f9fa262aa86
Quelldatensatz
uspto-grants-1993_05
Patentnummer
US05210084

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