Iodoethane → (+/-)-tert-butyl (1R,5S,6S)-6-ethoxy-5-methyl-3-(3-nitropyridin-4-yl)cyclohex-2-enylcarbamate

HRID 879208Notizen

Reaktionsgleichung

[OH:1][C@@H:2]1[C@H:7]([NH:8][C:9](=[O:15])[O:10][C:11]([CH3:14])([CH3:13])[CH3:12])[CH:6]=[C:5]([C:16]2[CH:21]=[CH:20][N:19]=[CH:18][C:17]=2[N+:22]([O-:24])=[O:23])[CH2:4][C@@H:3]1[CH3:25].I[CH2:27][CH3:28]>C1COCC1.[Ag]=O>[CH2:27]([O:1][C@@H:2]1[C@H:7]([NH:8][C:9](=[O:15])[O:10][C:11]([CH3:12])([CH3:13])[CH3:14])[CH:6]=[C:5]([C:16]2[CH:21]=[CH:20][N:19]=[CH:18][C:17]=2[N+:22]([O-:24])=[O:23])[CH2:4][C@@H:3]1[CH3:25])[CH3:28]

Komponenten

Reaktionsbedingungen

Temperatur: 55 °C

Versuchsvorschrift

(+/−)-Tert-butyl (1R,5S,6S)-6-hydroxy-5-methyl-3-(3-nitropyridin-4-yl)cyclohex-2-enylcarbamate (1.0 equiv.) was suspended in iodoethane (100.0 equiv.). Silver oxide (6.0 equiv.) was added to the mixture and the reaction vessel was wrapped in foil (kept dark) and allowed to stir 55° C. for 10 hrs. The reaction was diluted with THF and filtered through a pad of celite. The celite cake was further washed with MeOH. The organics were concentrated and the crude was taken up in DCM, washed with NaHCO3 (aq), dried over Na2SO4, filtered and concentrated. The crude was loaded onto silica gel and purified via ISCO to yield (+/−)-tert-butyl (1R,5S,6S)-6-ethoxy-5-methyl-3-(3-nitropyridin-4-yl)cyclohex-2-enylcarbamate in 31% yield. LC/MS (m/z)=378.1 (MH+), Rt=0.99 min.

Aufarbeitung

filtrationfiltered through a pad of celite
washThe celite cake was further washed with MeOH
concentrationThe organics were concentrated
washwashed with NaHCO3 (aq)
dry with materialdried over Na2SO4
filtrationfiltered
concentrationconcentrated
custompurified via ISCO

Quellen und Nachweise

ORD-Eintrag: ord-f9cf740c4c004b6da460aa4f60b577aa
Quelldatensatz: uspto-grants-2015_03
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US08987457B2

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