Water → {4-[(E)-2-(4-chloro-2-methoxy-pyridin-3-yl)-vinyl]-3-nitro-phenyl}-carbamic acid tert-butyl ester

HRID 1051214Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1051214
[C:1]([O:5][C:6]([NH:8][C:9]1[CH:14]=[CH:13][C:12]([CH2:15][CH:16](OC(=O)C(F)(F)F)[C:17]2[C:18]([O:24][CH3:25])=[N:19][CH:20]=[CH:21][C:22]=2[Cl:23])=[C:11]([N+:33]([O-:35])=[O:34])[CH:10]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2].O>C1COCC1>[C:1]([O:5][C:6](=[O:7])[NH:8][C:9]1[CH:14]=[CH:13][C:12](/[CH:15]=[CH:16]/[C:17]2[C:18]([O:24][CH3:25])=[N:19][CH:20]=[CH:21][C:22]=2[Cl:23])=[C:11]([N+:33]([O-:35])=[O:34])[CH:10]=1)([CH3:4])([CH3:2])[CH3:3]

Komponenten

4

Edukt 2

HCID 962WaterHCID 90102788Trifluoro-acetic acid 2-(4-tert-butoxycarbonylamino-2-nitro-phenyl)-1-(4-chloro-2-methoxy-pyridin-3-yl)-ethyl ester

Produkt 1

HCID 90102932{4-[(E)-2-(4-chloro-2-methoxy-pyridin-3-yl)-vinyl]-3-nitro-phenyl}-carbamic acid tert-butyl esterAusbeute 68 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Reaktionsbedingungen

Temperatur
70 °C

Versuchsvorschrift

A solution of trifluoro-acetic acid 2-(4-tert-butoxycarbonylamino-2-nitro-phenyl)-1-(4-chloro-2-methoxy-pyridin-3-yl)-ethyl ester (crude 1.60 g, 3.08 mmol) in THF (10 mL) was added 8-diazabicyclo[5.4.0]undec-7-ene (1.33 g, 8,74 mmol) at 25° C. The reaction was allowed to stir at 70° C. for 3 hours. The reaction mixture was cooled to 25° C., and poured into water. The aqueous phase was extracted three times with ethyl acetate. The combined organic layers were washed with brine and dried over magnesium sulfate. Filtration followed by concentration in vacuo gave a brown solid. Flash chromatography (80/20 hexanes/ethyl acetate) afforded {4-[(E)-2-(4-chloro-2-methoxy-pyridin-3-yl)-vinyl]-3-nitro-phenyl}-carbamic acid tert-butyl ester (800 mg, 68%) as an oil. MH+ 406.0.

Aufarbeitung

  1. temperatureThe reaction mixture was cooled to 25° C.
  2. extractionThe aqueous phase was extracted three times with ethyl acetate
  3. washThe combined organic layers were washed with brine
  4. dry with materialdried over magnesium sulfate
  5. filtrationFiltration
  6. concentrationfollowed by concentration in vacuo
  7. customgave a brown solid

Quellen und Nachweise

ORD-Eintrag
ord-929b11c3fe034904b4b83a5f1c6dc8b0
Quelldatensatz
uspto-grants-2016_07
Patentnummer
US09388166B2

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