1-Hydroxybenzotriazole → Ethyl [2-({[tert-butyl(diphenyl)silyl]oxy}acetyl)hydrazino](oxo)acetate

HRID 1881929

Reaktionsgleichung

Reaktionsgleichung von HRID 1881929
[NH:1]([C:3](=[O:9])[C:4]([O:6][CH2:7][CH3:8])=[O:5])[NH2:2].[Si:10]([O:27][CH2:28][C:29](O)=[O:30])([C:23]([CH3:26])([CH3:25])[CH3:24])([C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1)[C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1.Cl.CN(C)CCCN=C=NCC.ON1C2C=CC=CC=2N=N1>C(#N)C.C(OCC)(=O)C.C(N(CC)CC)C>[Si:10]([O:27][CH2:28][C:29]([NH:2][NH:1][C:3](=[O:9])[C:4]([O:6][CH2:7][CH3:8])=[O:5])=[O:30])([C:23]([CH3:25])([CH3:26])[CH3:24])([C:17]1[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=1)[C:11]1[CH:12]=[CH:13][CH:14]=[CH:15][CH:16]=1

Komponenten

8

Edukt 4

HCID 757711-HydroxybenzotriazoleHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 2786935Ethyl 2-hydrazinyl-2-oxoacetateHCID 111415642-((tert-Butyldiphenylsilyl)oxy)acetic acid

Produkt 1

HCID 59331270Ethyl [2-({[tert-butyl(diphenyl)silyl]oxy}acetyl)hydrazino](oxo)acetateAusbeute 30,3 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 6342AcetonitrileLösungsmittelHCID 8471TriethylamineLösungsmittelHCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

To a solution of ethyl hydrazino(oxo)acetate (3.58 g) in acetonitrile (100 mL) were successively added triethylamine (6.86 mL), {[tert-butyl(diphenyl)silyl]oxy}acetic acid (7.74 g), N-[3-(dimethylamino)propyl]-N′-ethylcarbodiimide hydrochloride (5.20 g) and 1-hydroxybenzotriazole (415 mg) under ice-cooling. The reaction mixture was warmed to room temperature and stirred overnight. The reaction mixture was diluted with ethyl acetate, washed with water and saturated aqueous sodium hydrogen carbonate. The ethyl acetate layer was dried (MgSO4) and concentrated. The residue was subjected to silica gel column chromatography, and the title compound (3.20 g, yield 30%) was obtained as a colorless amorphous solid from a fraction eluted with ethyl acetate-hexane (1:1, volume ratio).

Aufarbeitung

  1. temperaturecooling
  2. washwashed with water and saturated aqueous sodium hydrogen carbonate
  3. dry with materialThe ethyl acetate layer was dried (MgSO4)
  4. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-f81bd77762e7496785d175a139d9a3ec
Quelldatensatz
uspto-grants-2012_11
Patentnummer
US08318746B2

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