Potassium Carbonate → Tert-butyl 2-(methoxymethyl)-4-(2-oxopropyl)-1-oxa-4,9-diazaspiro[5.5]undecane-9-carboxylate

HRID 72918

Reaktionsgleichung

Reaktionsgleichung von HRID 72918
[CH3:1][O:2][CH2:3][CH:4]1[O:21][C:8]2([CH2:13][CH2:12][N:11]([C:14]([O:16][C:17]([CH3:20])([CH3:19])[CH3:18])=[O:15])[CH2:10][CH2:9]2)[CH2:7][NH:6][CH2:5]1.C([O-])([O-])=O.[K+].[K+].Br[CH2:29][C:30](=[O:32])[CH3:31]>C(#N)C.ClCCl>[CH3:1][O:2][CH2:3][CH:4]1[CH2:5][N:6]([CH2:29][C:30](=[O:32])[CH3:31])[CH2:7][C:8]2([CH2:13][CH2:12][N:11]([C:14]([O:16][C:17]([CH3:18])([CH3:20])[CH3:19])=[O:15])[CH2:10][CH2:9]2)[O:21]1

Komponenten

6

Edukt 3

HCID 11430Potassium CarbonateHCID 11715BromoacetoneHCID 70872666Tert-butyl 10-(methoxymethyl)-11-oxa-3,8-diazaspiro[5.5]undecane-3-carboxylate

Produkt 1

HCID 68291584Tert-butyl 2-(methoxymethyl)-4-(2-oxopropyl)-1-oxa-4,9-diazaspiro[5.5]undecane-9-carboxylate

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 6342AcetonitrileLösungsmittelHCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

To a mixture of tert-butyl 10-(methoxymethyl)-11-oxa-3,8-diazaspiro[5.5]undecane-3-carboxylate and K2CO3 (115 mg, 0.832 mmol) in acetonitrile (1.4 mL) was added 1-bromopropan-2-one (304 mg, 2.00 mmol). The reaction mixture was heated under argon in a sealed tube for 16 h. The mixture was cooled, diluted with dichloromethane and washed with water. The organic layer was dried over Na2SO4, filtered and concentrated in vacuo to provide tert-butyl 2-(methoxymethyl)-4-(2-oxopropyl)-1-oxa-4,9-diazaspiro[5.5]undecane-9-carboxylate. ESI-MS m/z calc. 356.2. Found 357.3 (M+1)+; Retention time: 0.98 minutes (3 min run).

Aufarbeitung

  1. temperatureThe reaction mixture was heated under argon in a sealed tube for 16 h
  2. temperatureThe mixture was cooled
  3. washwashed with water
  4. dry with materialThe organic layer was dried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo

Quellen und Nachweise

ORD-Eintrag
ord-a0749068d2904bb3a957c656ecdf9d97
Quelldatensatz
uspto-grants-2014_09
Patentnummer
US08828996B2

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