Triphenylphosphine → tert-butyl 4-({(2S)-2-[(2,5-dichloropyridin-3-yl)oxy]propanoyl}amino)piperidine-1-carboxylate

HRID 1026543Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1026543
[OH:1][C@H:2]([CH3:19])[C:3]([NH:5][CH:6]1[CH2:11][CH2:10][N:9]([C:12]([O:14][C:15]([CH3:18])([CH3:17])[CH3:16])=[O:13])[CH2:8][CH2:7]1)=[O:4].[Cl:20][C:21]1[C:26](O)=[CH:25][C:24]([Cl:28])=[CH:23][N:22]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OC(C)(C)C)=O)=NC(OC(C)(C)C)=O>O.O1CCCC1>[Cl:20][C:21]1[C:26]([O:1][C@@H:2]([CH3:19])[C:3]([NH:5][CH:6]2[CH2:11][CH2:10][N:9]([C:12]([O:14][C:15]([CH3:18])([CH3:17])[CH3:16])=[O:13])[CH2:8][CH2:7]2)=[O:4])=[CH:25][C:24]([Cl:28])=[CH:23][N:22]=1

Komponenten

7

Edukt 4

HCID 11776TriphenylphosphineHCID 97268Di-tert-butyl azodicarboxylateHCID 98989172,5-Dichloropyridin-3-OlHCID 68500407tert-butyl 4-{[(2R)-2-hydroxypropanoyl]amino}piperidine-1-carboxylate

Produkt 1

HCID 86671388tert-butyl 4-({(2S)-2-[(2,5-dichloropyridin-3-yl)oxy]propanoyl}amino)piperidine-1-carboxylateAusbeute 81,2 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 8028TetrahydrofuranLösungsmittel2×

Versuchsvorschrift

To a tetrahydrofuran solution (148 ml) of tert-butyl 4-{[(2R)-2-hydroxypropanoyl]amino}piperidine-1-carboxylate (5.13 g), 2,5-dichloropyridin-3-ol (3.40 g) and triphenylphosphine (6.41 g) was added dropwise at room temperature a tetrahydrofuran solution (40 ml) of di-tert-butyl azodicarboxylate (5.63 g) over 10 minutes. The reaction solution was stirred at room temperature for 1 hour, then poured into water, and extracted with ethyl acetate. The organic layer was washed sequentially with water and saturated sodium chloride solution, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography to afford tert-butyl 4-({(2S)-2-[(2,5-dichloropyridin-3-yl)oxy]propanoyl}amino)piperidine-1-carboxylate (6.40 g).

Aufarbeitung

  1. extractionextracted with ethyl acetate
  2. washThe organic layer was washed sequentially with water and saturated sodium chloride solution
  3. dry with materialdried over anhydrous sodium sulfate
  4. concentrationconcentrated under reduced pressure
  5. customThe residue was purified by silica gel column chromatography

Quellen und Nachweise

ORD-Eintrag
ord-8031a6ef764b43deae64f70a2479ef62
Quelldatensatz
uspto-grants-2014_05
Patentnummer
US08729095B2

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