Triethylamine → (4R)-N-[(1S)-1-Methyl-2-hydroxyethyl]-2-oxothiazolidin-4-yl-carboxamide

HRID 442758

Reaktionsgleichung

Reaktionsgleichung von HRID 442758
[O:1]=[C:2]1[NH:6][C@H:5]([C:7]([OH:9])=O)[CH2:4][S:3]1.[NH2:10][C@H:11]([CH2:13][OH:14])[CH3:12].C(N(CC)CC)C.C1(P(N=[N+]=[N-])(C2C=CC=CC=2)=O)C=CC=CC=1>O1CCCC1>[CH3:12][C@H:11]([NH:10][C:7]([C@@H:5]1[CH2:4][S:3][C:2](=[O:1])[NH:6]1)=[O:9])[CH2:13][OH:14]

Komponenten

6

Edukt 4

HCID 8471TriethylamineHCID 72390ProcysteineHCID 80307L-AlaninolHCID 199401P,P-Diphenylphosphinic azide

Produkt 1

HCID 21309140(4R)-N-[(1S)-1-Methyl-2-hydroxyethyl]-2-oxothiazolidin-4-yl-carboxamideAusbeute 66,3 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

In 20 ml of dry tetrahydrofuran were dissolved 1.0 g of (4R)-2-oxothiazolidine-4-carboxylic acid and 0.56 g of L-alaninol, 2.8 ml of triethylamine and 1.8 ml of diphenylphosphoryl azide were added thereto with stirring under ice-cooling, and the mixture was stirred at room temperature for 3 hours. Then, the solvent was distilled off under reduced pressure and the obtained residue was purified by silica gel column chromatography employing ethyl acetate as an eluent and further purified by silica gel column chromatography employing dichloromethane-methanol (95:5) as an eluent to obtain 0.92 g of the desired compound as colorless crystals.

Aufarbeitung

  1. additionwere added
  2. temperaturecooling
  3. stirringthe mixture was stirred at room temperature for 3 hours
  4. distillationThen, the solvent was distilled off under reduced pressure
  5. customthe obtained residue was purified by silica gel column chromatography
  6. customfurther purified by silica gel column chromatography

Quellen und Nachweise

ORD-Eintrag
ord-91ff4ee8f9bc4b65ad9810482c255100
Quelldatensatz
uspto-grants-1999_04
Patentnummer
US05891898

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