Water → Acetic Acid 2-(N'-benzyloxycarbonyl-hydrazino)-2-oxo-ethyl Ester

HRID 34051

Reaktionsgleichung

Reaktionsgleichung von HRID 34051
[CH2:1]([O:8][C:9]([NH:11][NH2:12])=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C(N(CC)CC)C.[C:20]([O:23][CH2:24][C:25](Cl)=[O:26])(=[O:22])[CH3:21].O>ClCCl>[CH2:1]([O:8][C:9]([NH:11][NH:12][C:25](=[O:26])[CH2:24][O:23][C:20](=[O:22])[CH3:21])=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Komponenten

6

Edukt 4

HCID 962WaterHCID 8471TriethylamineHCID 26297Acetoxyacetyl chlorideHCID 79242Benzyl carbazate

Produkt 1

HCID 59796922Acetic Acid 2-(N'-benzyloxycarbonyl-hydrazino)-2-oxo-ethyl Ester

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel2×

Versuchsvorschrift

To a solution of 2.04 g of hydrazine carboxylic acid benzyl ester in 40 mL of dichloromethane was added 2.57 mL of triethylamine. Under ice cooling, a solution of 1.32 mL of acetoxyacetylchloride in 20 mL of dichloromethane was added dropwise over 25 minutes, and stirred at room temperature for 1 hour. The reaction solution was added with water, extracted with ethyl acetate, and the resultant organic layer was washed with 1N hydrochloric acid, saturated aqueous sodium hydrogen carbonate and saturated brine, and then dried over magnesium sulfate. The solvent was evaporated, and the resulting solid product was washed with diethyl ether and collected by filtration, to give 1.92 g of the title compound as white crystals.

Aufarbeitung

  1. extractionextracted with ethyl acetate
  2. washthe resultant organic layer was washed with 1N hydrochloric acid, saturated aqueous sodium hydrogen carbonate and saturated brine
  3. dry with materialdried over magnesium sulfate
  4. customThe solvent was evaporated
  5. washthe resulting solid product was washed with diethyl ether
  6. filtrationcollected by filtration

Quellen und Nachweise

ORD-Eintrag
ord-3e03aa47feeb4a069b4480543ef84765
Quelldatensatz
uspto-grants-2008_09
Patentnummer
US07429609B2

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