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Acetic Acid → tert-Butyl 9-(5,6-dihydro-[1,2,4]triazolo[1,5-a]pyrazin-7(8H)-yl)-3-azaspiro[5.5]undecane-3-carboxylate

HRID 1253708
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1253708
C(O)(=O)C.O=[C:6]1[CH2:23][CH2:22][C:9]2([CH2:14][CH2:13][N:12]([C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[CH2:11][CH2:10]2)[CH2:8][CH2:7]1.[N:24]1[CH:25]=[N:26][N:27]2[CH2:32][CH2:31][NH:30][CH2:29][C:28]=12.[Na]>C(Cl)Cl.C([O-])(O)=O.[Na+]>[N:24]1[CH:25]=[N:26][N:27]2[CH2:32][CH2:31][N:30]([CH:6]3[CH2:23][CH2:22][C:9]4([CH2:14][CH2:13][N:12]([C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[CH2:11][CH2:10]4)[CH2:8][CH2:7]3)[CH2:29][C:28]=12
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Komponenten

7

Edukt 4

HCID 176Acetic AcidHCID 5360545SodiumHCID 184069195H,6H,7H,8H-(1,2,4)triazolo(1,5-a)pyrazineHCID 51072194tert-Butyl 9-oxo-3-azaspiro[5.5]undecane-3-carboxylate

Produkt 1

HCID 66701117tert-Butyl 9-(5,6-dihydro-[1,2,4]triazolo[1,5-a]pyrazin-7(8H)-yl)-3-azaspiro[5.5]undecane-3-carboxylateAusbeute 62 %

Reagenzien, Katalysatoren, Lösungsmittel

2
HCID 6344DichloromethaneLösungsmittel2×HCID 516892Sodium BicarbonateLösungsmittel

Versuchsvorschrift

Acetic acid (2.34 eq.) was added to a solution of tert-butyl 9-oxo-3-azaspiro[5.5]undecane-3-carboxylate (1.122 mmol, 1 eq.) and 5,6,7,8-tetrahydro-[1,2,4]triazolo[1,5-a]pyrazine (1.14 eq.) in methylene chloride (7 ml). Sodium triacetoxyborhydride (1.4 eq) was then added and the mixture was stirred at room temperature overnight. The reaction mixture was diluted with methylene chloride and sat. NaHCO3 solution. The aqueous phase was washed with methylene chloride (2×20 ml), and the combined organic phases were dried over Na2SO4 and concentrated in vacuo. The crude product was purified by column chromatography (silica, ethyl acetate/ethanol 10:1) to obtain the desired product. Yield: 62%

Aufarbeitung

  1. washThe aqueous phase was washed with methylene chloride (2×20 ml)
  2. dry with materialthe combined organic phases were dried over Na2SO4
  3. concentrationconcentrated in vacuo
  4. customThe crude product was purified by column chromatography (silica, ethyl acetate/ethanol 10:1)

Quellen und Nachweise

ORD-Eintrag
ord-14a9f0001dd04364973ca7fee12507fb
Quelldatensatz
uspto-grants-2013_06
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08455475B2

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