Triethylamine → N-(6-Chloro-3-nitro-2-pyridyl)-alanine methyl ester

HRID 21528

Reaktionsgleichung

Reaktionsgleichung von HRID 21528
Cl.[CH3:2][O:3][C:4](=[O:8])[C@H:5]([CH3:7])[NH2:6].C(N(CC)CC)C.Cl[C:17]1[C:22]([N+:23]([O-:25])=[O:24])=[CH:21][CH:20]=[C:19]([Cl:26])[N:18]=1>CN(C)C=O>[CH3:2][O:3][C:4](=[O:8])[C@H:5]([CH3:7])[NH:6][C:17]1[C:22]([N+:23]([O-:25])=[O:24])=[CH:21][CH:20]=[C:19]([Cl:26])[N:18]=1

Komponenten

5

Edukt 3

HCID 8471TriethylamineHCID 852392,6-Dichloro-3-nitropyridineHCID 2733257Alanine methyl ester hydrochloride

Produkt 1

HCID 54223679N-(6-Chloro-3-nitro-2-pyridyl)-alanine methyl esterAusbeute 69,3 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel2×

Versuchsvorschrift

L-Alanine methyl ester hydrochloride (8.4 g, 0.06 mol) was dissolved in 100 ml of anhydrous N,N-dimethylformamide, and 16.6 ml (0.12 mol) of triethylamine were added. Subsequently, while stirring vigorously, 10.7 g (0.05 mol) of 2,6-dichloro-3-nitropyridine in 20 ml of anhydrous N,N-dimethylformamide were slowly added dropwise, during which the reaction temperature rose above 40° C. After a further 3 h at room temperature, the reaction mixture was poured into about 400 ml of ice-water, extracted three times with ethyl acetate, dried (sodium sulfate) and concentrated. After chromatography on silica gel (ethyl acetate/heptane=1:5 then 1:2), 9.0 g (69%) of compound A were isolated as a yellow oil,

Aufarbeitung

  1. customrose above 40° C
  2. extractionextracted three times with ethyl acetate
  3. dry with materialdried (sodium sulfate)
  4. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-2bed1d3a2f1f4567a7156d2e388c0edc
Quelldatensatz
uspto-grants-1995_06
Patentnummer
US05424311

Verknüpfte Notizen

Wird geladen…