Hydrochloric Acid → (1S,2R,4S)-2-ethyl-4-hydroxy-N'-(5-tosyl-5H-pyrrolo[2,3-b]pyrazin-2-yl)cyclopentanecarbohydrazide

HRID 1969723Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1969723
[CH2:1]([C@@H:3]1[CH2:8][C@H:7]2[CH2:9][C@@H:4]1[C:5](=[O:10])[O:6]2)[CH3:2].[NH:11]([C:13]1[N:14]=[C:15]2[CH:21]=[CH:20][N:19]([S:22]([C:25]3[CH:31]=[CH:30][C:28]([CH3:29])=[CH:27][CH:26]=3)(=[O:24])=[O:23])[C:16]2=[N:17][CH:18]=1)[NH2:12].C[Al](C)C.Cl>O1CCOCC1>[CH2:1]([C@@H:3]1[CH2:8][C@H:7]([OH:6])[CH2:9][C@@H:4]1[C:5]([NH:12][NH:11][C:13]1[N:14]=[C:15]2[CH:21]=[CH:20][N:19]([S:22]([C:25]3[CH:31]=[CH:30][C:28]([CH3:29])=[CH:27][CH:26]=3)(=[O:24])=[O:23])[C:16]2=[N:17][CH:18]=1)=[O:10])[CH3:2]

Komponenten

6

Edukt 4

HCID 313Hydrochloric AcidHCID 16682925TrimethylaluminumHCID 580098102-Hydrazinyl-5-tosyl-5H-pyrrolo[2,3-b]pyrazineHCID 67998117(1S,4S,5R)-5-ethyl-2-oxabicyclo[2.2.1]heptan-3-one

Produkt 1

HCID 58557121(1S,2R,4S)-2-ethyl-4-hydroxy-N'-(5-tosyl-5H-pyrrolo[2,3-b]pyrazin-2-yl)cyclopentanecarbohydrazideAusbeute 71,4 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 312751,4-DioxaneLösungsmittel2×

Reaktionsbedingungen

Temperatur
80 °C

Versuchsvorschrift

To (1S,4S,5R)-5-ethyl-2-oxabicyclo[2.2.1]heptan-3-one (0.835 g, 5.96 mmol) in 1,4-dioxane (12 mL) was added 2-hydrazinyl-5-tosyl-5H-pyrrolo[2,3-b]pyrazine (step D, 1.810 g, 5.96 mmol). The reaction mixture was heated at about 80° C. for about 16 h then cooled to ambient temperature. 1,4-Dioxane (25 mL) and trimethylaluminum (2 N in toluene, 9 mL, 18 mmol) were added sequentially. The reaction mixture was stirred at ambient temperature for about 30 min then HCl (1 N aqueous, 50 mL) was added dropwise and the reaction mixture was stirred for about 30 min. The layers were separated and the aqueous portion was extracted with EtOAc (2×100 mL). The combined organic extracts were washed with water (10 mL), saturated aqueous NaHCO3 (15 mL), brine (15 mL) and dried over anhydrous MgSO4, filtered, and coned under reduced pressure. The residue was purified using silica gel chromatography (40 g) eluting with 100% EtOAc to give (1S,2R,4S)-2-ethyl-4-hydroxy-N′-(5-tosyl-5H-pyrrolo[2,3-b]pyrazin-2-yl)cyclopentanecarbohydrazide (1.887 g, 71%): LC/MS (Table 1, Method b) Rt=2.05 min; MS m/z: 444 (M+H)+.

Aufarbeitung

  1. temperaturethen cooled to ambient temperature
  2. stirringthe reaction mixture was stirred for about 30 min
  3. customThe layers were separated
  4. extractionthe aqueous portion was extracted with EtOAc (2×100 mL)
  5. washThe combined organic extracts were washed with water (10 mL), saturated aqueous NaHCO3 (15 mL), brine (15 mL)
  6. dry with materialdried over anhydrous MgSO4
  7. filtrationfiltered
  8. customThe residue was purified
  9. washeluting with 100% EtOAc

Quellen und Nachweise

ORD-Eintrag
ord-2cdc1bb1e0ae4338ba9434ea62d4bbfa
Quelldatensatz
uspto-grants-2013_04
Patentnummer
US08426411B2

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