Sodium Methoxide → 8-Ethoxy-4-hydroxy-3-(2,4,6-trimethyl-phenyl)-1,8-diaza-spiro[4.5]dec-3-en-2-one

HRID 1022377

Reaktionsgleichung

C[O:2][C:3]([C:5]1([NH:14][C:15](=[O:26])[CH2:16][C:17]2[C:22]([CH3:23])=[CH:21][C:20]([CH3:24])=[CH:19][C:18]=2[CH3:25])[CH2:10][CH2:9][N:8]([O:11][CH2:12][CH3:13])[CH2:7][CH2:6]1)=O.C[O-].[Na+]>CN(C)C=O.[Cl-].[Na+].O>[CH2:12]([O:11][N:8]1[CH2:9][CH2:10][C:5]2([NH:14][C:15](=[O:26])[C:16]([C:17]3[C:22]([CH3:23])=[CH:21][C:20]([CH3:24])=[CH:19][C:18]=3[CH3:25])=[C:3]2[OH:2])[CH2:6][CH2:7]1)[CH3:13]

Komponenten

Reaktionsbedingungen

Temperatur: 65 °C

Versuchsvorschrift

To a solution of 2.3 g of 1-ethoxy-4-[2-(2,4,6-trimethyl-phenyl)-acetylamino]-piperidine-4-carboxylic acid methyl ester in 26 ml of dimethylformamide is added 3 g of sodium methoxide. The reaction mixture is heated to 65° C. and stirred for 5 hours. The reaction mixture is poured into brine, neutralized and extracted with ethyl acetate. The organic phase is washed with brine, dried with sodium sulfate, filtered and concentrated. The residue is subjected to column chromatography (heptane/ethyl acetate 2:1) to yield 510 mg of 8-ethoxy-4-hydroxy-3-(2,4,6-trimethyl-phenyl)-1,8-diaza-spiro[4.5]dec-3-en-2-one as a solid, mp: >250° C.

Aufarbeitung

extractionextracted with ethyl acetate
washThe organic phase is washed with brine
dry with materialdried with sodium sulfate
filtrationfiltered
concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag: ord-ffdf53a0b4db4e33b98754217bd6a43d
Quelldatensatz: uspto-grants-2014_05
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US08722578B2

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