Water → Ethyl 2,8-dimethyl-3-oxa-2,7-diazabicyclo[3.3.0]octane-7-carboxylate

HRID 981105

Reaktionsgleichung

Reaktionsgleichung von HRID 981105
Cl.[CH3:2][NH:3][OH:4].C[O-].[Na+].[CH2:8]([N:11]([CH:17]([CH3:20])[CH:18]=O)[C:12]([O:14][CH2:15][CH3:16])=[O:13])[CH:9]=[CH2:10].O>CO.C1(C)C=CC=CC=1>[CH3:2][N:3]1[O:4][CH2:10][CH:9]2[CH:18]1[CH:17]([CH3:20])[N:11]([C:12]([O:14][CH2:15][CH3:16])=[O:13])[CH2:8]2

Komponenten

7

Edukt 4

HCID 962WaterHCID 77906N-methylhydroxylamine hydrochlorideHCID 10942334Sodium MethoxideHCID 15069993Ethyl N-allyl-N-(1-oxoprop-2-yl)-carbamate

Produkt 1

HCID 15070012Ethyl 2,8-dimethyl-3-oxa-2,7-diazabicyclo[3.3.0]octane-7-carboxylate

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 887MethanolLösungsmittelHCID 1140TolueneLösungsmittel2×

Versuchsvorschrift

A methanolic methylhydroxylamine solution is prepared from 16.4 g (0.2 mol) of N-methylhydroxylamine hydrochloride in 33 ml of absolute methanol and 36 g (0.2 mol) of 30% strength sodium methylate solution, and the solution formed is diluted with 130 ml of toluene and added dropwise to 354 g (0.17 mol) of N-allyl-N-(1-oxoprop-2-yl)-urethane in 250 ml of toluene, which is heated under reflux using a water separator. The mixture is heated under reflux overnight, the product is extracted with dilute hydrochloric acid and the hydrochloric acid solution is rendered alkaline with K2CO3 and extracted with CHCl3. The extract is dried over K2CO3 and concentrated and the residue is distilled.

Aufarbeitung

  1. customthe solution formed
  2. temperatureis heated
  3. temperatureunder reflux
  4. temperatureThe mixture is heated
  5. temperatureunder reflux overnight
  6. extractionthe product is extracted with dilute hydrochloric acid
  7. extractionextracted with CHCl3
  8. dry with materialThe extract is dried over K2CO3
  9. concentrationconcentrated
  10. distillationthe residue is distilled

Quellen und Nachweise

ORD-Eintrag
ord-59c4d964a9514601886bbfb2692e92f8
Quelldatensatz
uspto-grants-1991_02
Patentnummer
US04990517

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