Piconol → tert-butyl (3R)-6-cyclohexyl-3-(3-{[methyl(2-pyridinylmethyl)amino]carbonyl}-1,2,4-oxadiazol-5-yl)hexanoate

HRID 2182997Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2182997
[CH:1]1([CH2:7][CH2:8][CH2:9][C@@H:10]([C:19]2[O:23][N:22]=[C:21]([C:24]([NH:26][CH3:27])=[O:25])[N:20]=2)[CH2:11][C:12]([O:14][C:15]([CH3:18])([CH3:17])[CH3:16])=[O:13])[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1.C(P(CCCC)CCCC)CCC.O[CH2:42][C:43]1[CH:48]=[CH:47][CH:46]=[CH:45][N:44]=1>C1(C)C=CC=CC=1>[CH:1]1([CH2:7][CH2:8][CH2:9][C@@H:10]([C:19]2[O:23][N:22]=[C:21]([C:24]([N:26]([CH3:27])[CH2:42][C:43]3[CH:48]=[CH:47][CH:46]=[CH:45][N:44]=3)=[O:25])[N:20]=2)[CH2:11][C:12]([O:14][C:15]([CH3:17])([CH3:18])[CH3:16])=[O:13])[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6]1

Komponenten

5

Edukt 3

HCID 11474PiconolHCID 13831TributylphosphineHCID 59909740tert-butyl (3R)-6-cyclohexyl-3-{3-[(methylamino)carbonyl]-1,2,4-oxadiazol-5-yl}hexanoate

Produkt 1

HCID 59909745tert-butyl (3R)-6-cyclohexyl-3-(3-{[methyl(2-pyridinylmethyl)amino]carbonyl}-1,2,4-oxadiazol-5-yl)hexanoateAusbeute 45 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 1140TolueneLösungsmittel

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

1-1′-Azobis(N,N-dimethylformamide) (645 mg, 3.75 mmol) was added to a cooled solution of tert-butyl (3R)-6-cyclohexyl-3-{3-[(methylamino)carbonyl]-1,2,4-oxadiazol-5-yl}hexanoate (Preparation 7) (1.42 g, 3.75 mmol), tributylphosphine (930 μl, 3.75 mmol) and 2-hydroxymethylpyridine (240 μl, 2.50 mmol) in toluene (10 ml) and the resulting mixture was stirred at 0° C. under a nitrogen atmosphere for 15 minutes, then at room temperature for 72 hours. The mixture was filtered and the solvent removed from the filtrate under reduced pressure. The residue was purified by column chromatography on silica gel eluting with a gradient system of hexane:ethyl acetate (90:10) gradually changing to hexane:ethyl acetate (50:50) to afford the title compound as a pale yellow oil (530 mg).

Aufarbeitung

  1. waitat room temperature for 72 hours
  2. filtrationThe mixture was filtered
  3. customthe solvent removed from the filtrate under reduced pressure
  4. customThe residue was purified by column chromatography on silica gel eluting with a gradient system of hexane:ethyl acetate (90:10)

Quellen und Nachweise

ORD-Eintrag
ord-36155524eae0453f8d8b7d64e6615661
Quelldatensatz
uspto-grants-2005_05
Patentnummer
US06897306B2

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