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Triethylamine → 3-[(2-Tert-butoxycarbonylamino-ethyl)-ethoxycarbonyl-amino]-2-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-propionic acid methyl ester

HRID 1890408
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1890408
[CH3:1][O:2][C:3](=[O:28])[CH:4]([N:17]1[C:25](=[O:26])[C:24]2[C:19](=[CH:20][CH:21]=[CH:22][CH:23]=2)[C:18]1=[O:27])[CH2:5][NH:6][CH2:7][CH2:8][NH:9][C:10]([O:12][C:13]([CH3:16])([CH3:15])[CH3:14])=[O:11].C(N(CC)CC)C.Cl[C:37]([O:39][CH2:40][CH3:41])=[O:38].[Cl-].[NH4+]>ClCCl>[CH3:1][O:2][C:3](=[O:28])[CH:4]([N:17]1[C:18](=[O:27])[C:19]2[C:24](=[CH:23][CH:22]=[CH:21][CH:20]=2)[C:25]1=[O:26])[CH2:5][N:6]([CH2:7][CH2:8][NH:9][C:10]([O:12][C:13]([CH3:16])([CH3:14])[CH3:15])=[O:11])[C:37]([O:39][CH2:40][CH3:41])=[O:38]
KomponentenReaktionsbedingungenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

6

Edukt 4

HCID 8471TriethylamineHCID 10928Ethyl chloroformateHCID 25517Ammonium ChlorideHCID 669298353-(2-Tert-butoxycarbonylamino-ethylamino)-2-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-propionic acid methyl ester

Produkt 1

HCID 669299233-[(2-Tert-butoxycarbonylamino-ethyl)-ethoxycarbonyl-amino]-2-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-propionic acid methyl ester
Ausbeute 90,8 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel2×

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

To a solution of 18.80 g (47.54 mmol) of 3-(2-tert-butoxycarbonylamino-ethylamino)-2-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-propionic acid methyl ester dissolved in 156 mL of anhydrous dichloromethane was added 8.02 mL (57.05 mmol) of triethylamine. The resulting mixture was cooled at 0° C. and 5.00 mL (52.29 mmol) of ethyl chloroformate dissolved in 30 mL of anhydrous dichloromethane was added. The resulting mixture was stirred at room temperature for 12 h. Saturated aqueous solution of ammonium chloride was added and the mixture extracted with dichloromethane. The extracts were washed with a saturated aqueous solution of sodium chloride, sodium carbonate, dried over sodium sulfate and evaporated to dryness. The residue was chromatographed on silica gel eluting with a mixture of dichloromethane/methanol in the proportions 99/1 led to afford 20.00 g (90%) of the desired compound as an oil.

Aufarbeitung

  1. additionwas added
  2. extractionthe mixture extracted with dichloromethane
  3. washThe extracts were washed with a saturated aqueous solution of sodium chloride, sodium carbonate
  4. dry with materialdried over sodium sulfate
  5. customevaporated to dryness
  6. customThe residue was chromatographed on silica gel eluting with a mixture of dichloromethane/methanol in the proportions 99/1

Quellen und Nachweise

ORD-Eintrag
ord-4a03025e88e04858918655b988c1364e
Quelldatensatz
uspto-grants-2013_08
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08507476B2

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